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mathematics
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{{short description|field of study}}{{about|the study of topics such as quantity and structure|other uses|Mathematics (disambiguation)}}{{redirect|Math}}{{semiprotected|small=yes}}{{pp-move-indef}}{{Use mdy dates|date=October 2014}}File:Euclid.jpg|thumb|Euclid (holding calipers), Greek mathematician, 3rd century BC, as imagined by Raphael in this detail from The School of Athens.{{efn|No likeness or description of Euclid's physical appearance made during his lifetime survived antiquity. Therefore, Euclid's depiction in works of art depends on the artist's imagination (see EuclidEuclidMathematics (from Greek Î¼Î¬Î¸Î·Î¼Î± mÃ¡thÄ“ma, "knowledge, study, learning") includes the study of such topics as quantity,WEB,weblink mathematics, n., Oxford University Press, Oxford English Dictionary, 2012, June 16, 2012, The science of space, number, quantity, and arrangement, whose methods involve logical reasoning and usually the use of symbolic notation, and which includes geometry, arithmetic, algebra, and analysis., structure,BOOK, Mathematical Logic and the Foundations of Mathematics: An Introductory Survey, Dover, Kneebone, G.T., 1963, 4, 978-0-486-41712-7, Mathematics ... is simply the study of abstract structures, or formal patterns of connectedness., space, and change.BOOK, Calculus Concepts: An Informal Approach to the Mathematics of Change, Cengage Learning, Donald R., LaTorre, John W., Kenelly, Sherry S., Biggers, Laurel R., Carpenter, Iris B., Reed, Cynthia R., Harris, 2011, 2, 978-1-4390-4957-0, Calculus is the study of changeâ€”how things change, and how quickly they change., BOOK, Applied Mathematics, Tata McGrawâ€“Hill Education, Ramana, 2007, 2.10, 978-0-07-066753-2, The mathematical study of change, motion, growth or decay is calculus., BOOK, An Invitation to Mathematics: From Competitions to Research, Springer, Ziegler, GÃ¼nter M., GÃ¼nter M. Ziegler, 2011, vii, 978-3-642-19532-7, What Is Mathematics?, Mathematicians seek and use patterns to formulate new conjectures; they resolve the truth or falsity of conjectures by mathematical proof. When mathematical structures are good models of real phenomena, then mathematical reasoning can provide insight or predictions about nature. Through the use of abstraction and logic, mathematics developed from counting, calculation, measurement, and the systematic study of the shapes and motions of physical objects. Practical mathematics has been a human activity from as far back as written records exist. The research required to solve mathematical problems can take years or even centuries of sustained inquiry.Rigorous arguments first appeared in Greek mathematics, most notably in Euclid's Elements. Since the pioneering work of Giuseppe Peano (1858â€“1932), David Hilbert (1862â€“1943), and others on axiomatic systems in the late 19th century, it has become customary to view mathematical research as establishing truth by rigorous deduction from appropriately chosen axioms and definitions. Mathematics developed at a relatively slow pace until the Renaissance, when mathematical innovations interacting with new scientific discoveries led to a rapid increase in the rate of mathematical discovery that has continued to the present day.Eves, p. 306Galileo Galilei (1564â€“1642) said, "The universe cannot be read until we have learned the language and become familiar with the characters in which it is written. It is written in mathematical language, and the letters are triangles, circles and other geometrical figures, without which means it is humanly impossible to comprehend a single word. Without these, one is wandering about in a dark labyrinth."Marcus du Sautoy, A Brief History of Mathematics: 1. Newton and Leibniz {{webarchive|url=https://web.archive.org/web/20121206092629weblink |date=December 6, 2012 }}, BBC Radio 4, September 27, 2010. Carl Friedrich Gauss (1777â€“1855) referred to mathematics as "the Queen of the Sciences".Waltershausen, p. 79 Benjamin Peirce (1809â€“1880) called mathematics "the science that draws necessary conclusions".Peirce, p. 97. David Hilbert said of mathematics: "We are not speaking here of arbitrariness in any sense. Mathematics is not like a game whose tasks are determined by arbitrarily stipulated rules. Rather, it is a conceptual system possessing internal necessity that can only be so and by no means otherwise."Hilbert, D. (1919â€“20), Natur und Mathematisches Erkennen: Vorlesungen, gehalten 1919â€“1920 in GÃ¶ttingen. Nach der Ausarbeitung von Paul Bernays (Edited and with an English introduction by David E. Rowe), p. 14, Basel, BirkhÃ¤user (1992). Albert Einstein (1879â€“1955) stated that "as far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality."Mathematics is essential in many fields, including natural science, engineering, medicine, finance and the social sciences. Applied mathematics has led to entirely new mathematical disciplines, such as statistics and game theory. Mathematicians engage in pure mathematics, or mathematics for its own sake, without having any application in mind. Practical applications for what began as pure mathematics are often discovered.Peterson, p. 12{{TOC limit|3}}- the content below is remote from Wikipedia
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History
missing image!
- Plimpton 322.jpg -
The Babylonian mathematical tablet Plimpton 322, dated to 1800 BC.
File:Archimedes pi.svg|thumb|right|Archimedes used the method of exhaustion to approximate the value of pipiFile:Bakhshali numerals 2.jpg|thumb|right|350px|The numerals used in the Bakhshali manuscriptBakhshali manuscriptThe history of mathematics can be seen as an ever-increasing series of abstractions. The first abstraction, which is shared by many animals,JOURNAL, Abstract representations of numbers in the animal and human brain, Trends in Neurosciences, 21, 8, Aug 1998, 355â€“61, 10.1016/S0166-2236(98)01263-6, 9720604, harv, Dehaene, Stanislas, Dehaene-Lambertz, Ghislaine, Cohen, Laurent, was probably that of numbers: the realization that a collection of two apples and a collection of two oranges (for example) have something in common, namely quantity of their members.As evidenced by tallies found on bone, in addition to recognizing how to count physical objects, prehistoric peoples may have also recognized how to count abstract quantities, like time â€“ days, seasons, years.See, for example, Raymond L. Wilder, Evolution of Mathematical Concepts; an Elementary Study, passimEvidence for more complex mathematics does not appear until around 3000 BC, when the Babylonians and Egyptians began using arithmetic, algebra and geometry for taxation and other financial calculations, for building and construction, and for astronomy.Kline 1990, Chapter 1. The most ancient mathematical texts from Mesopotamia and Egypt are from 2000â€“1800 BC. Many early texts mention Pythagorean triples and so, by inference, the Pythagorean theorem seems to be the most ancient and widespread mathematical development after basic arithmetic and geometry. It is in Babylonian mathematics that elementary arithmetic (addition, subtraction, multiplication and division) first appear in the archaeological record. The Babylonians also possessed a place-value system, and used a sexagesimal numeral system, still in use today for measuring angles and time.{{sfn|Boyer|1991|loc="Mesopotamia" p. 24â€“27}}Beginning in the 6th century BC with the Pythagoreans, the Ancient Greeks began a systematic study of mathematics as a subject in its own right with Greek mathematics.BOOK, Heath, Thomas Little,weblink A History of Greek Mathematics: From Thales to Euclid, New York, Dover Publications, 1981, originally published 1921, 978-0-486-24073-2, Around 300 BC, Euclid introduced the axiomatic method still used in mathematics today, consisting of definition, axiom, theorem, and proof. His textbook Elements is widely considered the most successful and influential textbook of all time.{{sfn|Boyer|1991|loc="Euclid of Alexandria" p. 119}} The greatest mathematician of antiquity is often held to be Archimedes (c. 287â€“212 BC) of Syracuse.{{sfn|Boyer|1991|loc="Archimedes of Syracuse" p. 120}} He developed formulas for calculating the surface area and volume of solids of revolution and used the method of exhaustion to calculate the area under the arc of a parabola with the summation of an infinite series, in a manner not too dissimilar from modern calculus.{{sfn|Boyer|1991|loc="Archimedes of Syracuse" p. 130}} Other notable achievements of Greek mathematics are conic sections (Apollonius of Perga, 3rd century BC),{{sfn|Boyer|1991|loc="Apollonius of Perga" p. 145}} trigonometry (Hipparchus of Nicaea (2nd century BC),{{sfn|Boyer|1991|loc= "Greek Trigonometry and Mensuration" p. 162}} and the beginnings of algebra (Diophantus, 3rd century AD).{{sfn|Boyer|1991|loc= "Revival and Decline of Greek Mathematics" p. 180}}The Hinduâ€“Arabic numeral system and the rules for the use of its operations, in use throughout the world today, evolved over the course of the first millennium AD in India and were transmitted to the Western world via Islamic mathematics. Other notable developments of Indian mathematics include the modern definition of sine and cosine, and an early form of infinite series.(File:Image-Al-KitÄb al-muá¸«taá¹£ar fÄ« á¸¥isÄb al-ÄŸabr wa-l-muqÄbala.jpg|left|thumb|200px|A page from al-KhwÄrizmÄ«'s Algebra)During the Golden Age of Islam, especially during the 9th and 10th centuries, mathematics saw many important innovations building on Greek mathematics. The most notable achievement of Islamic mathematics was the development of algebra. Other notable achievements of the Islamic period are advances in spherical trigonometry and the addition of the decimal point to the Arabic numeral system. Many notable mathematicians from this period were Persian, such as Al-Khwarismi, Omar Khayyam and Sharaf al-DÄ«n al-á¹¬Å«sÄ«. During the early modern period, mathematics began to develop at an accelerating pace in Western Europe. The development of calculus by Newton and Leibniz in the 17th century revolutionized mathematics. Leonhard Euler was the most notable mathematician of the 18th century, contributing numerous theorems and discoveries. Perhaps the foremost mathematician of the 19th century was the German mathematician Carl Friedrich Gauss, who made numerous contributions to fields such as algebra, analysis, differential geometry, matrix theory,number theory, and statistics. In the early 20th century, Kurt GÃ¶del transformed mathematics by publishing his incompleteness theorems, which show that any axiomatic system that is consistent will contain unprovable propositions.Mathematics has since been greatly extended, and there has been a fruitful interaction between mathematics and science, to the benefit of both. Mathematical discoveries continue to be made today. According to Mikhail B. Sevryuk, in the January 2006 issue of the Bulletin of the American Mathematical Society, "The number of papers and books included in the Mathematical Reviews database since 1940 (the first year of operation of MR) is now more than 1.9 million, and more than 75 thousand items are added to the database each year. The overwhelming majority of works in this ocean contain new mathematical theorems and their proofs."{{sfn|Sevryuk|2006|pp=101â€“09}}- Plimpton 322.jpg -
The Babylonian mathematical tablet Plimpton 322, dated to 1800 BC.
Etymology
The word mathematics comes from Ancient Greek Î¼Î¬Î¸Î·Î¼Î± (mÃ¡thÄ“ma), meaning "that which is learnt",WEB, mathematic, Online Etymology Dictionary,weblink no,weblink" title="web.archive.org/web/20130307093926weblink">weblink March 7, 2013, mdy-all, "what one gets to know", hence also "study" and "science". The word for "mathematics" came to have the narrower and more technical meaning "mathematical study" even in Classical times.Both senses can be found in Plato. {{LSJ|maqhmatiko/s|Î¼Î±Î¸Î·Î¼Î±Ï„Î¹ÎºÎ®|ref}} Its adjective is (mathÄ“matikÃ³s), meaning "related to learning" or "studious", which likewise further came to mean "mathematical". In particular, (mathÄ“matiká¸— tÃ©khnÄ“), , meant "the mathematical art".Similarly, one of the two main schools of thought in Pythagoreanism was known as the mathÄ“matikoi (Î¼Î±Î¸Î·Î¼Î±Ï„Î¹ÎºÎ¿Î¯)â€”which at the time meant "teachers" rather than "mathematicians" in the modern sense.In Latin, and in English until around 1700, the term mathematics more commonly meant "astrology" (or sometimes "astronomy") rather than "mathematics"; the meaning gradually changed to its present one from about 1500 to 1800. This has resulted in several mistranslations. For example, Saint Augustine's warning that Christians should beware of mathematici, meaning astrologers, is sometimes mistranslated as a condemnation of mathematicians.BOOK, Lion Hunting and Other Mathematical Pursuits: A Collection of Mathematics, Verse, and Stories by the Late Ralph P. Boas, Jr, Cambridge University Press, Boas, Ralph, Ralph P. Boas Jr., 1995, 1991, 257,weblink What Augustine Didn't Say About Mathematicians, The apparent plural form in English, like the French plural form (and the less commonly used singular derivative ), goes back to the Latin neuter plural (Cicero), based on the Greek plural (ta mathÄ“matikÃ¡), used by Aristotle (384â€“322 BC), and meaning roughly "all things mathematical"; although it is plausible that English borrowed only the adjective mathematic(al) and formed the noun mathematics anew, after the pattern of physics and metaphysics, which were inherited from Greek.The Oxford Dictionary of English Etymology, Oxford English Dictionary, sub "mathematics", "mathematic", "mathematics" In English, the noun mathematics takes a singular verb. It is often shortened to maths or, in North America, math."maths, n." and "math, n.3". Oxford English Dictionary, on-line version (2012).Definitions of mathematics
File:Fibonacci.jpg|thumb|upright|Leonardo Fibonacci, the Italian mathematician who introduced the Hinduâ€“Arabic numeral systemHinduâ€“Arabic numeral systemMathematics has no generally accepted definition. Aristotle defined mathematics as "the science of quantity", and this definition prevailed until the 18th century.James Franklin, "Aristotelian Realism" in Philosophy of Mathematics, ed. A.D. Irvine, p. 104 {{webarchive|url=https://web.archive.org/web/20150906134402weblink |date=September 6, 2015 }}. Elsevier (2009). Starting in the 19th century, when the study of mathematics increased in rigor and began to address abstract topics such as group theory and projective geometry, which have no clear-cut relation to quantity and measurement, mathematicians and philosophers began to propose a variety of new definitions.BOOK, A History of Mathematics, American Mathematical Society (1991 reprint), Cajori, Florian, Florian Cajori, 1893, 285â€“86, 978-0-8218-2102-2, Some of these definitions emphasize the deductive character of much of mathematics, some emphasize its abstractness, some emphasize certain topics within mathematics. Today, no consensus on the definition of mathematics prevails, even among professionals.JOURNAL, Images of Mathematics Held by University Teachers of Mathematical Sciences, Mura, Roberta, Educational Studies in Mathematics, Dec 1993, 25, 4, 375â€“385, harv, 10.1007/BF01273907, 3482762, There is not even consensus on whether mathematics is an art or a science.BOOK, Iris Runge: A Life at the Crossroads of Mathematics, Science, and Industry, Springer, Tobies, Renate, Helmut Neunzert, yes, 2012, 9, 978-3-0348-0229-1, [I]t is first necessary to ask what is meant by mathematics in general. Illustrious scholars have debated this matter until they were blue in the face, and yet no consensus has been reached about whether mathematics is a natural science, a branch of the humanities, or an art form., Iris Runge, A great many professional mathematicians take no interest in a definition of mathematics, or consider it undefinable. Some just say, "Mathematics is what mathematicians do."Three leading types of definition of mathematics are called logicist, intuitionist, and formalist, each reflecting a different philosophical school of thought.JOURNAL, 10.2307/2689412, The Three Crises in Mathematics: Logicism, Intuitionism, and Formalism, Mathematics Magazine, September 1979, Ernst, Snapper, 52, 4, 207â€“16, 2689412, ., harv, 1975MathM..48...12G, All have severe problems, none has widespread acceptance, and no reconciliation seems possible.An early definition of mathematics in terms of logic was Benjamin Peirce's "the science that draws necessary conclusions" (1870).BOOK, Linear Associative Algebra, Peirce, Benjamin, Benjamin Peirce, 1882, 1,weblink no,weblink September 6, 2015, mdy-all, In the Principia Mathematica, Bertrand Russell and Alfred North Whitehead advanced the philosophical program known as logicism, and attempted to prove that all mathematical concepts, statements, and principles can be defined and proved entirely in terms of symbolic logic. A logicist definition of mathematics is Russell's "All Mathematics is Symbolic Logic" (1903).Bertrand Russell, The Principles of Mathematics, p. 5 {{webarchive|url=https://web.archive.org/web/20150906132941weblink |date=September 6, 2015 }}. University Press, Cambridge (1903)Intuitionist definitions, developing from the philosophy of mathematician L.E.J. Brouwer, identify mathematics with certain mental phenomena. An example of an intuitionist definition is "Mathematics is the mental activity which consists in carrying out constructs one after the other." A peculiarity of intuitionism is that it rejects some mathematical ideas considered valid according to other definitions. In particular, while other philosophies of mathematics allow objects that can be proved to exist even though they cannot be constructed, intuitionism allows only mathematical objects that one can actually construct.Formalist definitions identify mathematics with its symbols and the rules for operating on them. Haskell Curry defined mathematics simply as "the science of formal systems".BOOK, Outlines of a Formalist Philosophy of Mathematics, Elsevier, Curry, Haskell, Haskell Curry, 1951, 56, 978-0-444-53368-5, A formal system is a set of symbols, or tokens, and some rules telling how the tokens may be combined into formulas. In formal systems, the word axiom has a special meaning, different from the ordinary meaning of "a self-evident truth". In formal systems, an axiom is a combination of tokens that is included in a given formal system without needing to be derived using the rules of the system.Mathematics as science
File:Carl Friedrich Gauss.jpg|upright|thumb|left|Carl Friedrich GaussCarl Friedrich GaussThe German mathematician Carl Friedrich Gauss referred to mathematics as "the Queen of the Sciences". More recently, Marcus du Sautoy has called mathematics "the Queen of Science ... the main driving force behind scientific discovery".EPISODE, Nicolas Bourbaki,weblink 26 October 2017, A Brief History of Mathematics, Marcus, du Sautoy, BBC Radio 4, 25 June 2010, min. 12:50, no,weblink" title="web.archive.org/web/20161216050402weblink">weblink December 16, 2016, mdy-all, In the original Latin Regina Scientiarum, as well as in German KÃ¶nigin der Wissenschaften, the word corresponding to science means a "field of knowledge", and this was the original meaning of "science" in English, also; mathematics is in this sense a field of knowledge. The specialization restricting the meaning of "science" to natural science follows the rise of Baconian science, which contrasted "natural science" to scholasticism, the Aristotelean method of inquiring from first principles. The role of empirical experimentation and observation is negligible in mathematics, compared to natural sciences such as biology, chemistry, or physics. Albert Einstein stated that "as far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality."Einstein, p. 28. The quote is Einstein's answer to the question: "How can it be that mathematics, being after all a product of human thought which is independent of experience, is so admirably appropriate to the objects of reality?" This question was inspired by Eugene Wigner's paper "The Unreasonable Effectiveness of Mathematics in the Natural Sciences".Many philosophers believe that mathematics is not experimentally falsifiable, and thus not a science according to the definition of Karl Popper.BOOK, Out of Their Minds: The Lives and Discoveries of 15 Great Computer Scientists, Shasha, Dennis Elliot, Lazere, Cathy A., Springer, 1998, 228, However, in the 1930s GÃ¶del's incompleteness theorems convinced many mathematicians{{Who|date=January 2011}} that mathematics cannot be reduced to logic alone, and Karl Popper concluded that "most mathematical theories are, like those of physics and biology, hypothetico-deductive: pure mathematics therefore turns out to be much closer to the natural sciences whose hypotheses are conjectures, than it seemed even recently."Popper 1995, p. 56 Other thinkers, notably Imre Lakatos, have applied a version of falsificationism to mathematics itself.Imre Lakatos (1976), Proofs and Refutations. Cambridge: Cambridge University Press.WEB,weblink GÃ¡bor KutrovÃ¡tz, "Imre Lakatos's Philosophy of Mathematics", PDF, 2018-05-08, An alternative view is that certain scientific fields (such as theoretical physics) are mathematics with axioms that are intended to correspond to reality. Mathematics shares much in common with many fields in the physical sciences, notably the exploration of the logical consequences of assumptions. Intuition and experimentation also play a role in the formulation of conjectures in both mathematics and the (other) sciences. Experimental mathematics continues to grow in importance within mathematics, and computation and simulation are playing an increasing role in both the sciences and mathematics.The opinions of mathematicians on this matter are varied. Many mathematiciansSee, for example Bertrand Russell's statement "Mathematics, rightly viewed, possesses not only truth, but supreme beauty ..." in his History of Western Philosophy feel that to call their area a science is to downplay the importance of its aesthetic side, and its history in the traditional seven liberal arts; others{{Who|date=August 2009}} feel that to ignore its connection to the sciences is to turn a blind eye to the fact that the interface between mathematics and its applications in science and engineering has driven much development in mathematics. One way this difference of viewpoint plays out is in the philosophical debate as to whether mathematics is created (as in art) or discovered (as in science). It is common to see universities divided into sections that include a division of Science and Mathematics, indicating that the fields are seen as being allied but that they do not coincide. In practice, mathematicians are typically grouped with scientists at the gross level but separated at finer levels. This is one of many issues considered in the philosophy of mathematics.{{Citation needed|date=August 2009}}Inspiration, pure and applied mathematics, and aesthetics
{{multiple image|footer = Isaac Newton (left) and Gottfried Wilhelm Leibniz (right), developers of infinitesimal calculus|total_width = 330|width1 = 407|height1 = 559|image1 = GodfreyKneller-IsaacNewton-1689.jpg|alt1 = Isaac Newton|width2 = 320|height2 = 390|image2 = Gottfried Wilhelm Leibniz, Bernhard Christoph Francke.jpg|alt2 = Gottfried Wilhelm von Leibniz}}Mathematics arises from many different kinds of problems. At first these were found in commerce, land measurement, architecture and later astronomy; today, all sciences suggest problems studied by mathematicians, and many problems arise within mathematics itself. For example, the physicist Richard Feynman invented the path integral formulation of quantum mechanics using a combination of mathematical reasoning and physical insight, and today's string theory, a still-developing scientific theory which attempts to unify the four fundamental forces of nature, continues to inspire new mathematics.JOURNAL, The Feynman Integral and Feynman's Operational Calculus, Physics Today, 54, 8, 48, Johnson, Gerald W., Lapidus, Michel L., 2002, 978-0-8218-2413-9, 2001PhT....54h..48J, 10.1063/1.1404851, Some mathematics is relevant only in the area that inspired it, and is applied to solve further problems in that area. But often mathematics inspired by one area proves useful in many areas, and joins the general stock of mathematical concepts. A distinction is often made between pure mathematics and applied mathematics. However pure mathematics topics often turn out to have applications, e.g. number theory in cryptography. This remarkable fact, that even the "purest" mathematics often turns out to have practical applications, is what Eugene Wigner has called "the unreasonable effectiveness of mathematics".JOURNAL, Wigner, Eugene, 1960, The Unreasonable Effectiveness of Mathematics in the Natural Sciences,weblink Communications on Pure and Applied Mathematics, 13, 1, 1â€“14, 10.1002/cpa.3160130102, harv, 1960CPAM...13....1W, no,weblink" title="web.archive.org/web/20110228152633weblink">weblink February 28, 2011, mdy-all, As in most areas of study, the explosion of knowledge in the scientific age has led to specialization: there are now hundreds of specialized areas in mathematics and the latest Mathematics Subject Classification runs to 46 pages.WEB,weblink Mathematics Subject Classification 2010, PDF, November 9, 2010, no,weblink" title="web.archive.org/web/20110514091144weblink">weblink May 14, 2011, mdy-all, Several areas of applied mathematics have merged with related traditions outside of mathematics and become disciplines in their own right, including statistics, operations research, and computer science.For those who are mathematically inclined, there is often a definite aesthetic aspect to much of mathematics. Many mathematicians talk about the elegance of mathematics, its intrinsic aesthetics and inner beauty. Simplicity and generality are valued. There is beauty in a simple and elegant proof, such as Euclid's proof that there are infinitely many prime numbers, and in an elegant numerical method that speeds calculation, such as the fast Fourier transform. G.H. Hardy in A Mathematician's Apology expressed the belief that these aesthetic considerations are, in themselves, sufficient to justify the study of pure mathematics. He identified criteria such as significance, unexpectedness, inevitability, and economy as factors that contribute to a mathematical aesthetic.BOOK, A Mathematician's Apology, Hardy, G.H., Cambridge University Press, 1940, 978-0-521-42706-7, Mathematicians often strive to find proofs that are particularly elegant, proofs from "The Book" of God according to Paul ErdÅ‘s.BOOK, Proof and Other Dilemmas: Mathematics and Philosophy, Gold, Bonnie, Bonnie Gold, Simons, Rogers A., MAA, 2008, BOOK, Proofs from The Book, Aigner, Martin, Ziegler, GÃ¼nter M., GÃ¼nter M. Ziegler, Springer, 2001, 978-3-540-40460-6, The popularity of recreational mathematics is another sign of the pleasure many find in solving mathematical questions.Notation, language, and rigor
File:Leonhard Euler 2.jpg|upright|thumb|Leonhard EulerLeonhard EulerMost of the mathematical notation in use today was not invented until the 16th century.WEB,weblink Earliest Uses of Various Mathematical Symbols, September 14, 2014, no,weblink" title="web.archive.org/web/20160220073955weblink">weblink February 20, 2016, mdy-all, Before that, mathematics was written out in words, limiting mathematical discovery.Kline, p. 140, on Diophantus; p. 261, on Vieta. Euler (1707â€“1783) was responsible for many of the notations in use today. Modern notation makes mathematics much easier for the professional, but beginners often find it daunting. According to Barbara Oakley, this can be attributed to the fact that mathematical ideas are both more abstract and more encrypted than those of natural language.Oakley 2014, p. 16: "Focused problem solving in math and science is often more effortful than focused-mode thinking involving language and people. This may be because humans haven't evolved over the millennia to manipulate mathematical ideas, which are frequently more abstractly encrypted than those of conventional language." Unlike natural language, where people can often equate a word (such as cow) with the physical object it corresponds to, mathematical symbols are abstract, lacking any physical analog.Oakley 2014, p. 16: "What do I mean by abstractness? You can point to a real live cow chewing its cud in a pasture and equate it with the letters câ€“oâ€“w on the page. But you can't point to a real live plus sign that the symbol '+' is modeled after â€“ the idea underlying the plus sign is more abstract." Mathematical symbols are also more highly encrypted than regular words, meaning a single symbol can encode a number of different operations or ideas.Oakley 2014, p. 16: "By encryptedness, I mean that one symbol can stand for a number of different operations or ideas, just as the multiplication sign symbolizes repeated addition."Mathematical language can be difficult to understand for beginners because even common terms, such as or and only, have a more precise meaning than they have in everyday speech, and other terms such as open and field refer to specific mathematical ideas, not covered by their laymen's meanings. Mathematical language also includes many technical terms such as homeomorphism and integrable that have no meaning outside of mathematics. Additionally, shorthand phrases such as iff for "if and only if" belong to mathematical jargon. There is a reason for special notation and technical vocabulary: mathematics requires more precision than everyday speech. Mathematicians refer to this precision of language and logic as "rigor".Mathematical proof is fundamentally a matter of rigor. Mathematicians want their theorems to follow from axioms by means of systematic reasoning. This is to avoid mistaken "theorems", based on fallible intuitions, of which many instances have occurred in the history of the subject.{{efn|See false proof for simple examples of what can go wrong in a formal proof.}} The level of rigor expected in mathematics has varied over time: the Greeks expected detailed arguments, but at the time of Isaac Newton the methods employed were less rigorous. Problems inherent in the definitions used by Newton would lead to a resurgence of careful analysis and formal proof in the 19th century. Misunderstanding the rigor is a cause for some of the common misconceptions of mathematics. Today, mathematicians continue to argue among themselves about computer-assisted proofs. Since large computations are hard to verify, such proofs may not be sufficiently rigorous.Ivars Peterson, The Mathematical Tourist, Freeman, 1988, {{isbn|0-7167-1953-3}}. p. 4 "A few complain that the computer program can't be verified properly", (in reference to the Hakenâ€“Apple proof of the Four Color Theorem).Axioms in traditional thought were "self-evident truths", but that conception is problematic."The method of 'postulating' what we want has many advantages; they are the same as the advantages of theft over honest toil." Bertrand Russell (1919), Introduction to Mathematical Philosophy, New York and London, p. 71. {{webarchive|url=https://web.archive.org/web/20150620162751weblink |date=June 20, 2015 }} At a formal level, an axiom is just a string of symbols, which has an intrinsic meaning only in the context of all derivable formulas of an axiomatic system. It was the goal of Hilbert's program to put all of mathematics on a firm axiomatic basis, but according to GÃ¶del's incompleteness theorem every (sufficiently powerful) axiomatic system has undecidable formulas; and so a final axiomatization of mathematics is impossible. Nonetheless mathematics is often imagined to be (as far as its formal content) nothing but set theory in some axiomatization, in the sense that every mathematical statement or proof could be cast into formulas within set theory.Patrick Suppes, Axiomatic Set Theory, Dover, 1972, {{isbn|0-486-61630-4}}. p. 1, "Among the many branches of modern mathematics set theory occupies a unique place: with a few rare exceptions the entities which are studied and analyzed in mathematics may be regarded as certain particular sets or classes of objects."Fields of mathematics
{{see also|Areas of mathematics|Glossary of areas of mathematics}}File:Abacus 6.png|right|thumb|An abacusabacusMathematics can, broadly speaking, be subdivided into the study of quantity, structure, space, and change (i.e. arithmetic, algebra, geometry, and analysis). In addition to these main concerns, there are also subdivisions dedicated to exploring links from the heart of mathematics to other fields: to logic, to set theory (foundations), to the empirical mathematics of the various sciences (applied mathematics), and more recently to the rigorous study of uncertainty. While some areas might seem unrelated, the Langlands program has found connections between areas previously thought unconnected, such as Galois groups, Riemann surfaces and number theory.Foundations and philosophy
In order to clarify the foundations of mathematics, the fields of mathematical logic and set theory were developed. Mathematical logic includes the mathematical study of logic and the applications of formal logic to other areas of mathematics; set theory is the branch of mathematics that studies sets or collections of objects. Category theory, which deals in an abstract way with mathematical structures and relationships between them, is still in development. The phrase "crisis of foundations" describes the search for a rigorous foundation for mathematics that took place from approximately 1900 to 1930.Luke Howard Hodgkin & Luke Hodgkin, A History of Mathematics, Oxford University Press, 2005. Some disagreement about the foundations of mathematics continues to the present day. The crisis of foundations was stimulated by a number of controversies at the time, including the controversy over Cantor's set theory and the Brouwerâ€“Hilbert controversy.Mathematical logic is concerned with setting mathematics within a rigorous axiomatic framework, and studying the implications of such a framework. As such, it is home to GÃ¶del's incompleteness theorems which (informally) imply that any effective formal system that contains basic arithmetic, if sound (meaning that all theorems that can be proved are true), is necessarily incomplete (meaning that there are true theorems which cannot be proved in that system). Whatever finite collection of number-theoretical axioms is taken as a foundation, GÃ¶del showed how to construct a formal statement that is a true number-theoretical fact, but which does not follow from those axioms. Therefore, no formal system is a complete axiomatization of full number theory. Modern logic is divided into recursion theory, model theory, and proof theory, and is closely linked to theoretical computer science,{{Citation needed|date=March 2011}} as well as to category theory. In the context of recursion theory, the impossibility of a full axiomatization of number theory can also be formally demonstrated as a consequence of the MRDP theorem.Theoretical computer science includes computability theory, computational complexity theory, and information theory. Computability theory examines the limitations of various theoretical models of the computer, including the most well-known model â€“ the Turing machine. Complexity theory is the study of tractability by computer; some problems, although theoretically solvable by computer, are so expensive in terms of time or space that solving them is likely to remain practically unfeasible, even with the rapid advancement of computer hardware. A famous problem is the "{{nowrap|P {{=}} NP?}}" problem, one of the Millennium Prize Problems.Clay Mathematics Institute, P=NP, claymath.org Finally, information theory is concerned with the amount of data that can be stored on a given medium, and hence deals with concepts such as compression and entropy.
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Mathematical logic > | Set theory > | Category theory >| Theory of computation |
Pure mathematics
Quantity
The study of quantity starts with numbers, first the familiar natural numbers and integers ("whole numbers") and arithmetical operations on them, which are characterized in arithmetic. The deeper properties of integers are studied in number theory, from which come such popular results as Fermat's Last Theorem. The twin prime conjecture and Goldbach's conjecture are two unsolved problems in number theory.As the number system is further developed, the integers are recognized as a subset of the rational numbers ("fractions"). These, in turn, are contained within the real numbers, which are used to represent continuous quantities. Real numbers are generalized to complex numbers. These are the first steps of a hierarchy of numbers that goes on to include quaternions and octonions. Consideration of the natural numbers also leads to the transfinite numbers, which formalize the concept of "infinity". According to the fundamental theorem of algebra all solutions of equations in one unknown with complex coefficients are complex numbers, regardless of degree. Another area of study is the size of sets, which is described with the cardinal numbers. These include the aleph numbers, which allow meaningful comparison of the size of infinitely large sets.
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Natural numbers>Integers >Rational numbers >Real numbers >| Complex numbersStructure
Many mathematical objects, such as sets of numbers and functions, exhibit internal structure as a consequence of operations or relations that are defined on the set. Mathematics then studies properties of those sets that can be expressed in terms of that structure; for instance number theory studies properties of the set of integers that can be expressed in terms of arithmetic operations. Moreover, it frequently happens that different such structured sets (or structures) exhibit similar properties, which makes it possible, by a further step of abstraction, to state axioms for a class of structures, and then study at once the whole class of structures satisfying these axioms. Thus one can study groups, rings, fields and other abstract systems; together such studies (for structures defined by algebraic operations) constitute the domain of abstract algebra.By its great generality, abstract algebra can often be applied to seemingly unrelated problems; for instance a number of ancient problems concerning compass and straightedge constructions were finally solved using Galois theory, which involves field theory and group theory. Another example of an algebraic theory is linear algebra, which is the general study of vector spaces, whose elements called vectors have both quantity and direction, and can be used to model (relations between) points in space. This is one example of the phenomenon that the originally unrelated areas of geometry and algebra have very strong interactions in modern mathematics. Combinatorics studies ways of enumerating the number of objects that fit a given structure.
{|style="border:1px solid #ddd; text-align:center; margin:auto" cellspacing="15"96px)
(File:Rubik's cube.svg96px) (File:Lattice of the divisibility of 60.svg96px)Combinatorics >Number theory >Group theory >Graph theory >Order theory >| AlgebraSpace
The study of space originates with geometry â€“ in particular, Euclidean geometry, which combines space and numbers, and encompasses the well-known Pythagorean theorem. Trigonometry is the branch of mathematics that deals with relationships between the sides and the angles of triangles and with the trigonometric functions. The modern study of space generalizes these ideas to include higher-dimensional geometry, non-Euclidean geometries (which play a central role in general relativity) and topology. Quantity and space both play a role in analytic geometry, differential geometry, and algebraic geometry. Convex and discrete geometry were developed to solve problems in number theory and functional analysis but now are pursued with an eye on applications in optimization and computer science. Within differential geometry are the concepts of fiber bundles and calculus on manifolds, in particular, vector and tensor calculus. Within algebraic geometry is the description of geometric objects as solution sets of polynomial equations, combining the concepts of quantity and space, and also the study of topological groups, which combine structure and space. Lie groups are used to study space, structure, and change. Topology in all its many ramifications may have been the greatest growth area in 20th-century mathematics; it includes point-set topology, set-theoretic topology, algebraic topology and differential topology. In particular, instances of modern-day topology are metrizability theory, axiomatic set theory, homotopy theory, and Morse theory. Topology also includes the now solved PoincarÃ© conjecture, and the still unsolved areas of the Hodge conjecture. Other results in geometry and topology, including the four color theorem and Kepler conjecture, have been proved only with the help of computers.
{|style="border:1px solid #ddd; text-align:center; margin:auto" cellspacing="15"96px)
(File:SinusvÃ¥g 400px.png96px) (File:Torus.svg96px) (File:Measure illustration (Vector).svg|70px)Geometry >Trigonometry >Differential geometry >Topology >Fractal>Fractal geometry Measure theoryChange
Understanding and describing change is a common theme in the natural sciences, and calculus was developed as a powerful tool to investigate it. Functions arise here, as a central concept describing a changing quantity. The rigorous study of real numbers and functions of a real variable is known as real analysis, with complex analysis the equivalent field for the complex numbers. Functional analysis focuses attention on (typically infinite-dimensional) spaces of functions. One of many applications of functional analysis is quantum mechanics. Many problems lead naturally to relationships between a quantity and its rate of change, and these are studied as differential equations. Many phenomena in nature can be described by dynamical systems; chaos theory makes precise the ways in which many of these systems exhibit unpredictable yet still deterministic behavior.{|style="border:1px solid #ddd; text-align:center; margin:auto" cellspacing="20"96px) (File:Vector field.svg96px) (File:Limitcycle.svg96px) (File:Conformal grid after MÃ¶bius transformation.svg|96px)Calculus >Vector calculus>Differential equations >Dynamical systems >Chaos theory >| Complex analysisApplied mathematics
Applied mathematics concerns itself with mathematical methods that are typically used in science, engineering, business, and industry. Thus, "applied mathematics" is a mathematical science with specialized knowledge. The term applied mathematics also describes the professional specialty in which mathematicians work on practical problems; as a profession focused on practical problems, applied mathematics focuses on the "formulation, study, and use of mathematical models" in science, engineering, and other areas of mathematical practice.In the past, practical applications have motivated the development of mathematical theories, which then became the subject of study in pure mathematics, where mathematics is developed primarily for its own sake. Thus, the activity of applied mathematics is vitally connected with research in pure mathematics.Statistics and other decision sciences
Applied mathematics has significant overlap with the discipline of statistics, whose theory is formulated mathematically, especially with probability theory. Statisticians (working as part of a research project) "create data that makes sense" with random sampling and with randomized experiments;Rao, C.R. (1997) Statistics and Truth: Putting Chance to Work, World Scientific. {{isbn|981-02-3111-3}} the design of a statistical sample or experiment specifies the analysis of the data (before the data be available). When reconsidering data from experiments and samples or when analyzing data from observational studies, statisticians "make sense of the data" using the art of modelling and the theory of inference â€“ with model selection and estimation; the estimated models and consequential predictions should be tested on new data.{{efn|Like other mathematical sciences such as physics and computer science, statistics is an autonomous discipline rather than a branch of applied mathematics. Like research physicists and computer scientists, research statisticians are mathematical scientists. Many statisticians have a degree in mathematics, and some statisticians are also mathematicians.}}Statistical theory studies decision problems such as minimizing the risk (expected loss) of a statistical action, such as using a procedure in, for example, parameter estimation, hypothesis testing, and selecting the best. In these traditional areas of mathematical statistics, a statistical-decision problem is formulated by minimizing an objective function, like expected loss or cost, under specific constraints: For example, designing a survey often involves minimizing the cost of estimating a population mean with a given level of confidence.BOOK, Arthanari, T.S., Dodge, Yadolah, Yadolah Dodge, Rao, C.R., C.R. Rao, Foreword, Mathematical programming in statistics, Wiley Series in Probability and Mathematical Statistics, Wiley, New York, 1981, viiâ€“viii, 978-0-471-08073-2, 607328, harv, Because of its use of optimization, the mathematical theory of statistics shares concerns with other decision sciences, such as operations research, control theory, and mathematical economics.{{harvtxt|Whittle|1994|pp=10â€“11, 14â€“18}}: BOOK, Peter, Whittle, Peter Whittle (mathematician), Almost home, Frank Kelly (mathematician), F.P., Kelly, 1994, Probability, statistics and optimisation: A Tribute to Peter Whittle, Chichester, John Wiley, 978-0-471-94829-2, 1â€“28, harv,weblink previously "A realised path: The Cambridge Statistical Laboratory upto 1993 (revised 2002)", no,weblink" title="web.archive.org/web/20131219080017weblink">weblink December 19, 2013, mdy-all,Computational mathematics
Computational mathematics proposes and studies methods for solving mathematical problems that are typically too large for human numerical capacity. Numerical analysis studies methods for problems in analysis using functional analysis and approximation theory; numerical analysis includes the study of approximation and discretization broadly with special concern for rounding errors. Numerical analysis and, more broadly, scientific computing also study non-analytic topics of mathematical science, especially algorithmic matrix and graph theory. Other areas of computational mathematics include computer algebra and symbolic computation.{|style="border:1px solid #ddd; text-align:center; margin:0 auto" cellspacing="20"96px) (File:BernoullisLawDerivationDiagram.svg96px) (File:Maximum boxed.png96px) (File:Oldfaithful3.png96px)Game theory >Fluid dynamics >Numerical analysis >Mathematical optimization>Optimization Probability theory Statistics Cryptography96px) (File:Gravitation space source.svg96px) (File:Signal transduction pathways.svg96px) (File:Simple feedback control loop2.svg|96px)Mathematical finance >Mathematical physics >Mathematical chemistry >Mathematical biology>Mathematical economics >| Control theoryMathematical awards
Arguably the most prestigious award in mathematics is the Fields Medal,{{sfn|Monastyrsky|2001|p=1|ps=: "The Fields Medal is now indisputably the best known and most influential award in mathematics."}}{{sfn|Riehm|2002|pp=778â€“82}} established in 1936 and awarded every four years (except around World War II) to as many as four individuals. The Fields Medal is often considered a mathematical equivalent to the Nobel Prize.The Wolf Prize in Mathematics, instituted in 1978, recognizes lifetime achievement, and another major international award, the Abel Prize, was instituted in 2003. The Chern Medal was introduced in 2010 to recognize lifetime achievement. These accolades are awarded in recognition of a particular body of work, which may be innovational, or provide a solution to an outstanding problem in an established field.A famous list of 23 open problems, called "Hilbert's problems", was compiled in 1900 by German mathematician David Hilbert. This list achieved great celebrity among mathematicians, and at least nine of the problems have now been solved. A new list of seven important problems, titled the "Millennium Prize Problems", was published in 2000. Only one of them, the Riemann hypothesis, duplicates one of Hilbert's problems. A solution to any of these problems carries a $1 million reward.See also
{{col div|colwidth=30em}}- Lists of mathematics topics
- Mathematical sciences
- Mathematics and art
- Mathematics education
- National Museum of Mathematics
- Philosophy of mathematics
- Relationship between mathematics and physics
- Science, Technology, Engineering, and Mathematics
Notes
{{notelist}}Footnotes
References
- BOOK, Boyer, C.B., Carl Benjamin Boyer, A History of Mathematics, 2nd, New York, Wiley, 1991, 978-0-471-54397-8, harv,
- BOOK, Courant, Richard, Richard Courant, Robbins, Herbert, Herbert Robbins, What Is Mathematics?: An Elementary Approach to Ideas and Methods, New York, Oxford University Press, 2nd, 1996, 978-0-19-510519-3,
- EPISODE, Nicolas Bourbaki,weblink 26 October 2017, A Brief History of Mathematics, Marcus, du Sautoy, Marcus du Sautoy, BBC Radio 4, 25 June 2010,
- BOOK, Einstein, Albert, Albert Einstein, Sidelights on Relativity: I. Ether and relativity. II. Geometry and experience (translated by G.B. Jeffery, D.Sc., and W. Perrett, Ph.D), E.P. Dutton & Co., New York,weblink 1923,
- BOOK, Eves, Howard, An Introduction to the History of Mathematics, 6th, Saunders, 1990, 978-0-03-029558-4,
- BOOK, Kline, Morris, Morris Kline, Mathematical Thought from Ancient to Modern Times, New York, Oxford University Press, Paperback, 1990, 978-0-19-506135-2,
- JOURNAL,weblink 2001, Some Trends in Modern Mathematics and the Fields Medal, Monastyrsky, Michael, Canadian Mathematical Society, July 28, 2006, PDF, harv,
- BOOK, Oakley, Barbara, Barbara Oakley, A Mind For Numbers: How to Excel at Math and Science (Even If You Flunked Algebra), 2014, Penguin Random House, New York,weblink 9780399165245,
- BOOK, Pappas, Theoni, The Joy Of Mathematics, Wide World Publishing, Revised, June 1989, 978-0-933174-65-8,
- JOURNAL, 97â€“229, Linear associative algebra, Benjamin, Peirce, Benjamin Peirce, Charles Sanders Peirce, Charles Sanders, Peirce, Corrected, expanded, and annotated revision with an 1875 paper by B. Peirce and annotations by his son, C.S. Peirce, of the 1872 lithograph, American Journal of Mathematics, 4, 1881,weblink Corrected, expanded, and annotated revision with an 1875 paper by B. Peirce and annotations by his son, C. S. Peirce, of the 1872 lithograph ed. Google Eprint and as an extract, D. Van Nostrand, 1882, Google Eprint, 1â€“4, 10.2307/2369153, harv, 2369153, .
- BOOK, Peterson, Ivars, Mathematical Tourist, New and Updated Snapshots of Modern Mathematics, Owl Books, 2001, 978-0-8050-7159-7,
- BOOK, Karl R., Popper, Karl Popper, In Search of a Better World: Lectures and Essays from Thirty Years, New York: Routledge, On knowledge, 1995, 978-0-415-13548-1, 1992sbwl.book.....P,
- JOURNAL, Riehm, Carl, The Early History of the Fields Medal, Notices of the AMS, 49, 7, 778â€“72, August 2002,weblink PDF, harv,
- JOURNAL, Sevryuk, Mikhail B., January 2006, Book Reviews, Bulletin of the American Mathematical Society, 43, 1, 101â€“09,weblink PDF, June 24, 2006, 10.1090/S0273-0979-05-01069-4, harv, 1994BAMaS..30..205W,
- BOOK, Waltershausen, Wolfgang Sartorius von, Wolfgang Sartorius von Waltershausen, Gauss zum GedÃ¤chtniss, 1965, first published 1856, SÃ¤ndig Reprint Verlag H. R. Wohlwend, 978-3-253-01702-5,
Further reading
- BOOK, Benson, Donald C., The Moment of Proof: Mathematical Epiphanies, Oxford University Press, 2000, 978-0-19-513919-8,
- BOOK, Davis, Philip J., Hersh, Reuben, The Mathematical Experience, Mariner Books, Reprint, 1999, 978-0-395-92968-1, The Mathematical Experience,
- BOOK, Gullberg, Jan, Jan Gullberg, Mathematics: From the Birth of Numbers, W. W. Norton & Company, 1st, 1997, 978-0-393-04002-9,
- BOOK, Hazewinkel, Michiel, Encyclopaedia of Mathematics, Kluwer Academic Publishers, 2000, Encyclopaedia of Mathematics, â€“ A translated and expanded version of a Soviet mathematics encyclopedia, in ten volumes. Also in paperback and on CD-ROM, and online.
- BOOK, Jourdain, Philip E. B., The Nature of Mathematics, The World of Mathematics, James R. Newman, Dover Publications, 2003, 978-0-486-43268-7,
- BOOK, Maier, Annaliese, At the Threshold of Exact Science: Selected Writings of Annaliese Maier on Late Medieval Natural Philosophy, Steven Sargent, Philadelphia, University of Pennsylvania Press, 1982,
External links
{{external links|date=October 2015}}{{Sister project links|Mathematics}}{{Wikiversity school}}{{Library resources box |by=no |onlinebooks=no |others=no |about=yes |label=Mathematics}}- {{Britannica|369194|Mathematics}}
- {{In Our Time|Mathematics|p00545hk|Mathematics}}
- Free Mathematics books Free Mathematics books collection.
- Encyclopaedia of Mathematics online encyclopaedia from Springer, Graduate-level reference work with over 8,000 entries, illuminating nearly 50,000 notions in mathematics.
- HyperMath site at Georgia State University
- FreeScience Library The mathematics section of FreeScience library
- Rusin, Dave: weblink" title="web.archive.org/web/20030130131813weblink">The Mathematical Atlas. A guided tour through the various branches of modern mathematics. (Can also be found at weblink" title="web.archive.org/web/20061006114449weblink">NIU.edu.)
- Cain, George: Online Mathematics Textbooks available free online.
- Tricki, Wiki-style site that is intended to develop into a large store of useful mathematical problem-solving techniques.
- Mathematical Structures, list information about classes of mathematical structures.
- Mathematician Biographies. The MacTutor History of Mathematics archive Extensive history and quotes from all famous mathematicians.
- Metamath. A site and a language, that formalize mathematics from its foundations.
- Nrich, a prize-winning site for students from age five from Cambridge University
- Open Problem Garden, a wiki of open problems in mathematics
- Planet Math. An online mathematics encyclopedia under construction, focusing on modern mathematics. Uses the Attribution-ShareAlike license, allowing article exchange with Wikipedia. Uses TeX markup.
- weblink" title="web.archive.org/web/20060617235118weblink">Some mathematics applets, at MIT
- Weisstein, Eric et al.: Wolfram MathWorld: World of Mathematics. An online encyclopedia of mathematics.
- Patrick Jones' Video Tutorials on Mathematics
- Citizendium: Theory (mathematics).
- Maths.SE A Q&A site for mathematics
- MathOverflow A Q&A site for research-level mathematics
- "Mathematics and Platonism", BBC Radio 4 discussion with Ian Stewart, Margaret Wertheim and John D. Barrow (In Our Time, Jan. 11, 2001)
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