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Nicolas Bourbaki
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{{About|the group of mathematicians named Nicolas Bourbaki|the family of French officers named Bourbaki|Bourbaki family (disambiguation)|the computer scientist|Nikolaos Bourbakis}}File:Bourbaki congress1938.png|thumb|Bourbaki congress at Dieulefit on 1938. From left, Simone Weil, Charles Pisot, AndrÃ© Weil, Jean DieudonnÃ© (sitting), Claude Chabauty, Charles Ehresmann, and Jean DelsarteJean DelsarteNicolas Bourbaki is the collective pseudonym under which a group of (mainly French) 20th-century mathematicians, with the aim of reformulating mathematics on an extremely abstract and formal but self-contained basis, wrote a series of books beginning in 1935. With the goal of grounding all of mathematics on set theory, the group strove for rigour and generality. Their work led to the discovery of several concepts and terminologies still used, and influenced modern branches of mathematics.While there is no one person named Nicolas Bourbaki, the Bourbaki group, officially known as the Association des collaborateurs de Nicolas Bourbaki (Association of Collaborators of Nicolas Bourbaki), has an office at the Ã‰cole Normale SupÃ©rieure in Paris.- the content below is remote from Wikipedia
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Foundation
In 1934, young French mathematicians from various French universities felt the need to form a group to jointly produce textbooks that they could all use for teaching. AndrÃ© Weil organized the first meeting on 10 December 1934 in the basement of a Parisian grill room, while all participants were attending a conference in Paris.Books by Bourbaki
File:Bourbaki, Theorie des ensembles maitrier.jpg|thumb|First volume of Ã‰lÃ©ments de mathÃ©matiqueÃ‰lÃ©ments de mathÃ©matiqueBourbaki's main work is the Elements of Mathematics (Ã‰lÃ©ments de mathÃ©matique) series. This series aims to be a completely self-contained treatment of the core areas of modern mathematics. Assuming no special knowledge of mathematics, it takes up mathematics from the very beginning, proceeds axiomatically and gives complete proofs.
Set theory (ThÃ©orie des ensembles) JOURNAL, Bagemihl, F., Frederick Bagemihl, Review: ThÃ©orie des ensembles (Chapter III), Bull. Amer. Math. Soc., 1958, 64, 6, 390â€“391,weblink 10.1090/s0002-9904-1958-10248-7,
Algebra (AlgÃ¨bre) JOURNAL, Artin, E., Emil Artin, Review: Ã‰lÃ©ments de mathÃ©matique, by N. Bourbaki, Book II, Algebra, Chaps. Iâ€“VII, Bull. Amer. Math. Soc., 1953, 59, 5, 474â€“479,weblink 10.1090/s0002-9904-1953-09725-7, JOURNAL, Rosenberg, Alex, Alex F. T. W. Rosenberg, Review: Ã‰lÃ©ments de mathÃ©matiques by N. Bourbaki. Book II, AlgÃ¨bre. Chapter VIII, Modules et anneaux semi-simples, Bull. Amer. Math. Soc., 1960, 66, 1, 16â€“19,weblink 10.1090/S0002-9904-1960-10371-0, JOURNAL, Kaplansky, Irving, Irving Kaplansky, Review: Formes sesquilinÃ©airies et formes quadratiques by N. Bourbaki, Ã‰lÃ©ments de mathÃ©matique I, Livre II, Bull. Amer. Math. Soc., 1960, 66, 4, 266â€“267,weblink 10.1090/s0002-9904-1960-10461-2,
Topology (Topologie gÃ©nÃ©rale)
Functions of one real variable (Fonctions d'une variable rÃ©elle)
Topological vector spaces (Espaces vectoriels topologiques)
Integration (IntÃ©gration) JOURNAL, Halmos, Paul, Paul Halmos, Review: IntÃ©gration (Chap. I-IV) by N. Bourbaki, Bull. Amer. Math. Soc., 1953, 59, 3, 249â€“255,weblink 10.1090/S0002-9904-1953-09698-7, JOURNAL, Munroe, M. E., Review: IntÃ©gration (Chapter V) by N. Bourbaki, Bull. Amer. Math. Soc., 1958, 64, 3, 105â€“106,weblink 10.1090/s0002-9904-1958-10176-7,
and later
Algebra (AlgÃ¨bre) JOURNAL, Artin, E., Emil Artin, Review: Ã‰lÃ©ments de mathÃ©matique, by N. Bourbaki, Book II, Algebra, Chaps. Iâ€“VII, Bull. Amer. Math. Soc., 1953, 59, 5, 474â€“479,weblink 10.1090/s0002-9904-1953-09725-7, JOURNAL, Rosenberg, Alex, Alex F. T. W. Rosenberg, Review: Ã‰lÃ©ments de mathÃ©matiques by N. Bourbaki. Book II, AlgÃ¨bre. Chapter VIII, Modules et anneaux semi-simples, Bull. Amer. Math. Soc., 1960, 66, 1, 16â€“19,weblink 10.1090/S0002-9904-1960-10371-0, JOURNAL, Kaplansky, Irving, Irving Kaplansky, Review: Formes sesquilinÃ©airies et formes quadratiques by N. Bourbaki, Ã‰lÃ©ments de mathÃ©matique I, Livre II, Bull. Amer. Math. Soc., 1960, 66, 4, 266â€“267,weblink 10.1090/s0002-9904-1960-10461-2,
Topology (Topologie gÃ©nÃ©rale)
Functions of one real variable (Fonctions d'une variable rÃ©elle)
Topological vector spaces (Espaces vectoriels topologiques)
Integration (IntÃ©gration) JOURNAL, Halmos, Paul, Paul Halmos, Review: IntÃ©gration (Chap. I-IV) by N. Bourbaki, Bull. Amer. Math. Soc., 1953, 59, 3, 249â€“255,weblink 10.1090/S0002-9904-1953-09698-7, JOURNAL, Munroe, M. E., Review: IntÃ©gration (Chapter V) by N. Bourbaki, Bull. Amer. Math. Soc., 1958, 64, 3, 105â€“106,weblink 10.1090/s0002-9904-1958-10176-7,
Commutative algebra (AlgÃ¨bre commutative) JOURNAL, Nagata, M., Masayoshi Nagata, Ã‰lÃ©ments de mathÃ©matique. AlgÃ¨bre commutative, by N. Bourbaki, Chapitres 8 et 9, Bull. Amer. Math. Soc. (N.S.), 1985, 12, 1, 175â€“177,weblink 10.1090/s0273-0979-1985-15338-8,
Lie groups and algebras (Groupes et algÃ¨bres de Lie)
Spectral theory (ThÃ©ories spectrales)
Algebraic topology (Topologie AlgÃ©brique)WEB, Topologie AlgÃ©brique, Chapitres 1 Ã 4 {{!, N. Bourbaki {{!}} Springer|url =weblink|website = www.springer.com|access-date = 2016-02-08}}
The book VariÃ©tÃ©s diffÃ©rentielles et analytiques was a fascicule de rÃ©sultats, that is, a summary of results, on the theory of manifolds, rather than a worked-out exposition. The (still incomplete) volume on spectral theory (ThÃ©ories spectrales) from 1967 was for almost four decades the last new book to be added to the series. After that several new chapters to existing books as well as revised editions of existing chapters appeared until the publication of chapters 8-9 of Commutative Algebra in 1983. A long break in publishing activity followed, leading many to suspect the end of the publishing project. However, chapter 10 of Commutative Algebra appeared in 1998, and after another long break a completely re-written and expanded chapter 8 of AlgÃ¨bre was published in 2012. More importantly, the first four chapters of a completely new book on algebraic topology were published in 2016. The new material from 2012 and 2014 address some references to forthcoming books in the book on Lie Groups and Algebras; there remain other such references (some very precise) to expected additional chapters of the book spectral theory.Besides the Ã‰lÃ©ments de mathÃ©matique series, lectures from the SÃ©minaire Bourbaki also have been periodically published in monograph form since 1948.Lie groups and algebras (Groupes et algÃ¨bres de Lie)
Spectral theory (ThÃ©ories spectrales)
Algebraic topology (Topologie AlgÃ©brique)WEB, Topologie AlgÃ©brique, Chapitres 1 Ã 4 {{!, N. Bourbaki {{!}} Springer|url =weblink|website = www.springer.com|access-date = 2016-02-08}}
Influence on mathematics in general
{{also|Structuralism (philosophy of mathematics)}}Notations introduced by Bourbaki include the symbol varnothing for the empty set and a dangerous bend symbol â˜¡, and the terms injective, surjective, and bijective.{{citation needed|date=December 2011}}The emphasis on rigour may be seen as a reaction to the work of Henri PoincarÃ©,Bourbaki came to terms with PoincarÃ© only after a long struggle. When I joined the group in the fifties it was not the fashion to value PoincarÃ© at all. He was old-fashioned. Pierre Cartier interviewed by Marjorie Senechall. JOURNAL, The Continuing Silence of Bourbaki, Mathematical Intelligencer, 1998, 19, 22â€“28, weblink who stressed the importance of free-flowing mathematical intuition, at a cost of completeness in presentation. The impact of Bourbaki's work initially was great on many active research mathematicians worldwide. For example:It provoked some hostility, too, mostly on the side of classical analysts; they approved of rigour but not of high abstraction. Around 1950, also, some parts of geometry were still not fully axiomatic â€” in less prominent developments, one way or another, these were brought into line with the new foundational standards, or quietly dropped. This led to a gulf with the way theoretical physics was practiced.JOURNAL, Stewart, Ian, Bye-Bye Bourbaki: Paradigm Shifts in Mathematics, The Mathematical Gazette, November 1995, 79, 496â€“498, The Mathematical Association, 10.2307/3618076, 486, 3618076, Bourbaki's direct influence has decreased over time. This is partly because certain concepts which are now important, such as the machinery of category theory, are not covered in the treatise. {{Citation needed|date=January 2014}} The completely uniform and essentially linear referential structure of the books became difficult to apply to areas closer to current research than the already mature ones treated in the published books, and thus publishing activity diminished significantly from the 1970s.Borel (1998) It also mattered that, while especially algebraic structures can be naturally defined in Bourbaki's terms, there are areas where the Bourbaki approach was less straightforward to apply.{{Citation needed|date=March 2009}}On the other hand, the approach and rigour advocated by Bourbaki have permeated the current mathematical practices to such extent that the task undertaken was completed.Chevalley in Guedj (1985) This is particularly true for the less applied parts of mathematics.The Bourbaki seminar series founded in post-WWII Paris continues; it has been going on since 1948, and contains more than 1000 items. It is an important source of survey articles, with sketches (or sometimes improvements) of proofs. The topics range through all branches of mathematics, including sometimes theoretical physics. The idea is that the presentation should be on the level of specialists, but should be tailored to an audience which is not specialized in the particular field.The group
missing image!
- Weil.jpg -
AndrÃ© Weil, de facto early leader of the group
Accounts of the early days vary, but original documents have now come to light. The founding members were all connected to the Ã‰cole Normale SupÃ©rieure in Paris and included Henri Cartan, Claude Chevalley, Jean Coulomb, Jean Delsarte, Jean DieudonnÃ©, Charles Ehresmann, RenÃ© de Possel, Szolem Mandelbrojt and AndrÃ© Weil. There was a preliminary meeting, towards the end of 1934.The minutes are in the Bourbaki archives â€” for a full description of the initial meeting consult Liliane Beaulieu in the Mathematical Intelligencer. Jean Leray and Paul Dubreil were present at the preliminary meeting but dropped out before the group actually formed. Other notable participants in later days were Hyman Bass, Laurent Schwartz, Jean-Pierre Serre, Alexander Grothendieck, Jean-Louis Koszul, Samuel Eilenberg, Serge Lang and Roger Godement.The original goal of the group had been to compile an improved mathematical analysis text; it was soon decided that a more comprehensive treatment of all of mathematics was necessary. There was no official status of membership, and at the time the group was quite secretive and also fond of supplying disinformation. Regular meetings were scheduled (totalling about 4 weeks a year), during which the group would discuss vigorously every proposed line of every book. Members had to resign by age 50.This resulted in a complete change of personnel by 1958; see Robert Mainard paper cited below. However, the Aubin paper cited below quotes the historian Liliane Beaulieu as never having found written affirmation of this rule.The atmosphere in the group can be illustrated by an anecdote told by Laurent Schwartz. DieudonnÃ© regularly and spectacularly threatened to resign unless topics were treated in their logical order, and after a while others played on this for a joke. Godement's wife wanted to see DieudonnÃ© announcing his resignation, and so on one occasion while she was there Schwartz deliberately brought up again the question of permuting the order in which measure theory and topological vector spaces were to be handled, to precipitate a guaranteed crisis.The name "Bourbaki" refers to a French general, Charles Denis Bourbaki;A. Weil: The Apprenticeship of a Mathematician, BirkhÃ¤user Verlag 1992, pp 93-122. it was adopted by the group as a reference to a student anecdote about a hoax mathematical lecture, and also possibly to a statue.It is said that Weil's wife Evelyne supplied Nicolas. (Mentioned by McCleary (PDF) {{webarchive|url=https://web.archive.org/web/20061030215012weblink |date=2006-10-30 }}. This is more or less confirmed by Robert Mainard((PDF), a long article in French, which gives numerous further details: why N?, and the prank lecture of Raoul Husson in a false beard that gave rise to Bourbaki's theorem). They married in 1937, she having previously been with de Possel; who then unsurprisingly left the group.- Weil.jpg -
AndrÃ© Weil, de facto early leader of the group
Appraisal of the Bourbaki perspective
The underlying drive, in Weil and Chevalley at least, was the perceived need for French mathematics to absorb the best ideas of the GÃ¶ttingen school, particularly Hilbert and the modern algebra school of Noether, Artin and van der Waerden. It is fairly clear that the Bourbaki point of view, while encyclopedic, was never intended as neutral. Quite the opposite: it was more a question of trying to make a consistent whole out of some enthusiasms, for example for Hilbert's legacy, with emphasis on formalism and axiomatics. But always through a transforming process of reception and selectionâ€”their ability to sustain this collective, critical approach has been described as "something unusual".Hector C. Sabelli, Louis H. Kauffman, BIOS (2005), p. 423.The following is a list of some of the criticisms commonly made of the Bourbaki approach. Pierre Cartier, a Bourbaki member 1955â€“1983, commented explicitly on several of these points:- Algorithmic content is not considered on-topic and is almost completely omitted.This is one of the reasons for diminishing influence: Le dÃ©veloppement des mathÃ©matiques dites appliquÃ©es, de la statistique et des probabilitÃ©s, des thÃ©ories liÃ©es Ã l'informatique a diminuÃ© l'influence de Bourbakiweblink
- Analysis is treated 'softly', without 'hard' estimates.Lennart Carleson spoke of this in an interview (Infomat August 2006 (PDF) {{Webarchive|url=https://web.archive.org/web/20060928042809weblink |date=2006-09-28 }}): ...that book [from 1968] was written mostly as a way to encourage the teachers to stay with established values. That was during the Bourbaki and New Math period and mathematics was really going to pieces, I think. The teachers were very worried and they had very little backing.
- Measure theory is developed from a functional analytic perspective. Taking the case of locally compact measure spaces as fundamental focuses the presentation on Radon measures and leads to an approach to measurable functions that is cumbersome, especially from the viewpoint of probability theory.Heinz KÃ¶nig: The traditional abstract measure theory which emerged from the achievements of Borel and Lebesgue in the first two decades of the 20th century is burdened with its total limitation to sequential procedures and its neglect of regularity. The alternative theory due to Bourbaki which arose in the middle of the century was able to relieve these burdens, but produced new ones. In particular its fundamental turn to inner regularity, based on the profound role of compactness, was done with the inappropriate weapons from the outer arsenal, which subsequently enforced that unfortunate construction named the essential one. All this produced serious obstacles against a unified theory of measure and integration, for example for the notion of signed measures, the formation of products and for the representation theorems of Daniell-Stone and Riesz types.weblink {{Webarchive|url=https://web.archive.org/web/20070304000104weblink |date=2007-03-04 }} However, the last chapter of the book addresses limitations, especially for use in probability theory, of the restriction to locally compact spaces.
- Combinatorics is not discussed.
- Logic is treated minimally.Discussed by the set theorist Adrian Mathias (The Ignorance of Bourbaki (PDF)). See also Mashaal (2006), p.120, "Lack of interest in foundations".
- Applications are not covered.
DieudonnÃ© as speaker for Bourbaki
Public discussion of, and justification for, Bourbaki's thoughts has in general been through Jean DieudonnÃ© (who initially was the 'scribe' of the group) writing under his own name. In a survey of le choix bourbachique written in 1977, he did not shy away from a hierarchical development of the 'important' mathematics of the time.He also wrote extensively under his own name: nine volumes on analysis, perhaps in belated fulfillment of the original project or pretext; and also on other topics mostly connected with algebraic geometry. While DieudonnÃ© could reasonably speak on Bourbaki's encyclopedic tendency and tradition, it may be doubtedâ€”after innumerable frank tais-toi, DieudonnÃ©! ("Hush, DieudonnÃ©!") remarks at the meetingsâ€”whether all others agreed with him about mathematical writing and research. In particular Serre has often championed greater attention to problem-solving, within number theory especially, not an area treated in the main Bourbaki texts.DieudonnÃ© stated the view that most workers in mathematics were doing ground-clearing work, in order that a future Riemann could find the way ahead intuitively open. He pointed to the way the axiomatic method can be used as a tool for problem-solving, for example by Alexander Grothendieck. Others found him too close to Grothendieck to be an unbiased observer. Comments in PÃ¡l TurÃ¡n's 1970 speech on the award of a Fields Medal to Alan Baker about theory-building and problem-solving were a reply from the traditionalist camp at the next opportunity,JOURNAL, 2272765, Review of On the Work of ., Paul Turán; Effective Methods in the Theory of Numbers., Alan Baker, Alonzo, Church, 1 January 1972, 37, 3, 606â€“606, 10.2307/2272765, Grothendieck having received the previous Fields Medal in absentia in 1966.Bourbaki's influence on mathematics education
While several of Bourbaki's books have become standard references in their fields, some have felt that the austere presentation makes them unsuitable as textbooks.JOURNAL, Hewitt, Edwin, Review: Espaces vectoriels topologiques, Bulletin of the American Mathematical Society, 62, 1956, 507â€“508, 10.1090/S0002-9904-1956-10042-6, 5, weblink The books' influence may have been at its strongest when few other graduate-level texts in current pure mathematics were available, between 1950 and 1960weblink the longer term, the manifesto of Bourbaki has had a definite and deep influence. In secondary education the new math movement corresponded to teachers influenced by Bourbaki. In France the change was secured by the Lichnerowicz Commission.Mashaal (2006) Ch.10: New Math in the ClassroomThe influence on graduate education in pure mathematics is perhaps most noticeable in the treatment now current of Lie groups and Lie algebras. DieudonnÃ© at one point said 'one can do nothing serious without them', for which he was reproached; but the change in Lie theory to its everyday usage owes much to the type of exposition Bourbaki championed. Beforehand Jacques Hadamard despaired of ever getting a clear idea of it.{{citation needed|date=March 2013}}{{vague|date=June 2013}}See also
- People
Notes
{{Reflist|colwidth=30em}}References
- JOURNAL
, Borel
, Armand
, Armand Borel
, Twenty-Five Years with Nicolas Bourbaki, (1949-1973)
, Notices Amer. Math. Soc.
, 45
, 3
, 373â€“380
,
,
, 1998
,weblink
,
,
,
, Armand
, Armand Borel
, Twenty-Five Years with Nicolas Bourbaki, (1949-1973)
, Notices Amer. Math. Soc.
, 45
, 3
, 373â€“380
,
,
, 1998
,weblink
,
,
,
- JOURNAL
, Guedj
, D.
,
, Nicholas Bourbaki, collective mathematician : An interview with Claude Chevalley
, Math. Intelligencer
, 7
, 2
, 18â€“22
,
,
, 1985
,
, 10.1007/BF03024169
,
,
, D.
,
, Nicholas Bourbaki, collective mathematician : An interview with Claude Chevalley
, Math. Intelligencer
, 7
, 2
, 18â€“22
,
,
, 1985
,
, 10.1007/BF03024169
,
,
- JOURNAL, Aubin, David, 1997, The Withering Immortality of Nicolas Bourbaki: A Cultural Connector at the Confluence of Mathematics,weblink PDF, Science in Context, 10, 297â€“342, 10.1017/s0269889700002660, {{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }}
- Luca Vercelloni, Filosofia delle strutture, La Nuova Italia, Firenze, 1989
- Maurice Mashaal (2006). Bourbaki: A Secret Society of Mathematicians. American Mathematical Society. {{ISBN|0-8218-3967-5}}.
- Amir Aczel (2007). The Artist and the Mathematician: The Story of Nicolas Bourbaki, the Genius Mathematician Who Never Existed. High Stakes Publishing, London. {{ISBN|1-84344-034-2}}.
- AndrÃ© Weil (1992). ``The Apprenticeship of a Mathematician``. Birkhauser. {{ISBN|0-8176-2650-6}}. pp. 100â€“105.
External links
- Official Website of L'Association des Collaborateurs de Nicolas Bourbaki {{fr icon}}
- Archives of the association {{fr icon}}
- A long article about Nicolas Bourbaki, from PlanetMath
- 25 Years with Bourbaki, by Armand Borel
- {{MacTutor Biography|id=Bourbaki}}
- Apology of Euclid, by SemÃ«n Samsonovich Kutateladze
- weblink
- dmaorg.info/found/15398642_14/clancy.html
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