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[[File:Andrew wiles1-3.jpg|thumb|[[Andrew Wiles|Sir Andrew John Wiles]]]]
'''Wiles' proof of Fermat's Last Theorem''' is a [[Mathematical proof|proof]] of the [[modularity theorem]] for [[semistable elliptic curve]]s released by [[Andrew Wiles]], which, together with [[Ribet's theorem]], provides a proof for [[Fermat's Last Theorem]]. Both Fermat's Last Theorem and the Modularity Theorem were almost universally considered inaccessible to proof by contemporaneous mathematicians (meaning, impossible or virtually impossible to prove using current knowledge). Wiles first announced his proof in June 1993<ref name=nyt>{{cite news|last=Kolata|first=Gina|title=At Last, Shout of 'Eureka!' In Age-Old Math Mystery|url=http://www.nytimes.com/1993/06/24/us/at-last-shout-of-eureka-in-age-old-math-mystery.html|accessdate=21 January 2013|newspaper=The New York Times|date=24 June 1993}}</ref> in a version that was soon recognized as having a serious gap in a key point. He then corrected the proof, in part via collaboration with a colleague, and the final, widely accepted, version was released by Wiles in September 1994, and formally published in 1995. The proof uses many techniques from [[algebraic geometry]] and [[number theory]], and has many ramifications in these branches of mathematics. It also uses standard constructions of modern algebraic geometry, such as the [[category (mathematics)|category]] of [[scheme (mathematics)|schemes]] and [[Iwasawa theory]], and other 20th-century techniques not available to Fermat.


The proof itself is over 150 pages long and consumed seven years<ref name = nyt/> of Wiles's research time. For solving Fermat's Last Theorem, he was [[Orders, decorations, and medals of the United Kingdom#Knighthood|knighted]], and received other honors.
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==Progress of the previous decades==
Fermat's Last Theorem states that no three positive integers ''a'', ''b'', and ''c'' can satisfy the equation
: <math>a^n + b^n=c^n \!</math>
if ''n'' is an integer greater than two.
 
In the 1950s and 1960s a connection between [[elliptic curve]]s and [[modular form]]s was conjectured by the Japanese mathematician [[Goro Shimura]] based on ideas posed by [[Yutaka Taniyama]]. In the West it became well known through a 1967 paper by [[André Weil]].  With Weil giving conceptual evidence for it, it is sometimes called the [[Modularity theorem|Taniyama–Shimura–Weil conjecture]]. It states that every [[rational number|rational]] elliptic curve is [[classical modular curve|modular]].
 
On a separate branch of development, in the late 1960s, Yves Hellegouarch came up with the idea of associating solutions (''a'',''b'',''c'') of Fermat's equation with a completely different mathematical object: an elliptic curve.<ref>{{Cite book | last=Hellegouarch | first=Yves | title=Invitation to the Mathematics of Fermat–Wiles | publisher=Academic Press | year=2001 | isbn=978-0-12-339251-0 }}</ref> The curve consists of all points in the plane whose coordinates (''x'',&nbsp;''y'') satisfy the relation
: <math> y^2 = x(x-a^n)(x+b^n). \, </math>
Such an elliptic curve would enjoy very special properties, which are due to the appearance of high powers of integers in its equation and the fact that ''a''<sup>''n''</sup>&nbsp;+&nbsp;''b''<sup>''n''</sup> = ''c''<sup>''n''</sup> is a ''n''th power as well.
 
In 1982–1985, [[Gerhard Frey]] called attention to the unusual properties of the same curve as Hellegouarch, now called a [[Frey curve]]. This provided a bridge between Fermat and Taniyama by showing that a counterexample to Fermat's Last Theorem would create such a curve that would not be [[modular curve|modular]]. Again, the conjecture says that each elliptic curve with [[Rational number|rational]] coefficients can be constructed in an entirely different way, not by giving its equation but by using [[modular function]]s to [[parametric curve|parametrize]] coordinates ''x'' and ''y'' of the points on it. Thus, according to the conjecture, any elliptic curve over '''Q''' would have to be a [[modular elliptic curve]], yet if a solution to Fermat's equation with non-zero ''a'', ''b'', ''c'' and ''n'' greater than 2 existed, the corresponding curve would not be modular, resulting in a contradiction. As such, a proof or disproof of either of Fermat's Last Theorem or the Taniyama–Shimura–Weil conjecture would simultaneously prove or disprove the other.<ref>Singh, pp. 194–198; Aczel, pp. 109–114.</ref>
 
In 1985, [[Jean-Pierre Serre]] proposed that a Frey curve could not be modular and provided a partial proof of this. This showed that a proof of the [[semistable elliptic curve|semistable]] case of the Taniyama–Shimura conjecture would imply Fermat's Last Theorem. Serre did not provide a complete proof of his proposal; the missing part became known as the [[epsilon theorem|epsilon conjecture]] or ε-conjecture (now known as [[Ribet's theorem]]). Serre's main interest was in an even more ambitious conjecture, [[Serre conjecture (number theory)|Serre's conjecture]] on modular [[Galois representations]], which would imply the [[Modularity theorem|Taniyama–Shimura conjecture]]. Although in the preceding twenty or thirty years much evidence had been accumulated to form conjectures about elliptic curves, the main reason to believe that these various conjectures were true lay not in the numerical confirmations, but in a remarkably coherent and attractive mathematical picture that they presented. Equally it could happen that one or more of these conjectures were actually untrue.
 
Following this strategy, a proof of Fermat's Last Theorem required two steps. First, it was necessary to show that Frey's intuition was correct: that the above elliptic curve (now known as a [[Frey curve]]), if it exists, is always non-modular. Frey did not quite succeed in proving this rigorously; the missing piece (the so-called "[[epsilon conjecture]]", now known as [[Ribet's theorem]]) was noticed by [[Jean-Pierre Serre]]{{cn|date=May 2013}} and proven in 1986 by [[Ken Ribet]].  Second, it was necessary to prove the modularity theorem—or at least to prove it for the sub-class of cases (known as [[semistable elliptic curve]]s) which included Frey's equation.
 
:* Ribet's theorem—if proven—would show that any solution to Fermat's equation could be used to generate a semistable elliptic curve that was not modular;
:* The modularity theorem—if proven for Frey's equation—would show that all such elliptic curves must be modular.
:* The contradiction implies that no solutions can exist to Fermat's equation, thus proving Fermat's Last Theorem.
 
In the summer of 1986, [[Kenneth Alan Ribet|Ken Ribet]] succeeded in proving the epsilon conjecture. (His article was published in 1990.) He demonstrated that, just as Frey had anticipated, a special case of the [[Modularity theorem|Taniyama–Shimura conjecture]] (still unproven at the time), together with the now proven epsilon conjecture, implies Fermat's Last Theorem. Thus, if the [[Modularity theorem|Taniyama–Shimura conjecture]] is true for semistable elliptic curves, then Fermat's Last Theorem would be true. However this theoretical approach was widely considered unattainable, since the Taniyama–Shimura conjecture was itself widely seen as completely inaccessible to proof with current knowledge.<ref name="Singh" />{{rp|203–205, 223, 226}} For example, Wiles' ex-supervisor [[John H. Coates|John Coates]] states that it seemed "impossible to actually prove",<ref name="Singh" />{{rp|226}} and Ken Ribet considered himself "one of the vast majority of people who believed [it] was completely inaccessible".<ref name="Singh" />{{rp|223}}
 
Hearing of the 1986 proof of the epsilon conjecture, Wiles decided to begin researching exclusively towards a proof of the Taniyama–Shimura conjecture. Ribet later commented that "Andrew Wiles was probably one of the few people on earth who had the audacity to dream that you can actually go and prove [it]."&nbsp;<ref name="Singh" />{{rp|223}}
 
==Wiles' proof==
 
===Overview===
Wiles opted to attempt and match elliptic curves to counted modular forms. He found that this direct approach was not working, so he transformed the problem by instead matching the [[Galois representation]]s of the elliptic curves to modular forms. Wiles denotes this matching (or mapping) that, more specifically, is a [[ring homomorphism]]:
:<math> R_n \rightarrow T_n. </math>
''R'' is a deformation ring and ''T'' is a [[Hecke algebra|Hecke ring]].
 
Wiles had the insight that in many cases this ring [[homomorphism]] could be a ring [[isomorphism]]. (Conjecture 2.16 in Chapter 2, §3) He realized that the map between ''R'' and ''T'' is an isomorphism if and only if two [[abelian group]]s occurring in the theory are finite and have the same [[cardinality]]. This is sometimes referred to as the "numerical criterion". Given this result, one can see that Fermat's Last Theorem is reduced to a statement saying that two groups have the same order. Much of the text of the proof leads into topics and theorems related to [[ring theory]] and [[commutation theory]]. The Goal is to verify that the map ''R'' → ''T'' is an isomorphism and ultimately that ''R''=''T''. This is the long and difficult step. In treating deformations, Wiles defines four cases, with the [[Group scheme#Finite flat group schemes|flat]] deformation case requiring more effort to prove and is treated in a separate article in the same volume entitled "Ring-theoretic properties of certain Hecke algebras".
 
[[Gerd Faltings]], in his bulletin, on p.&nbsp;745. gives this [[commutative diagram]]:
 
:[[File:Faltings diagram.png|230px]]
 
or ultimately that ''R'' = ''T'', indicating a [[complete intersection]]. Since Wiles cannot show that ''R''=''T'' directly, he does so through ''Z3'', ''F3'' and ''T''/''m'' via [[Lift (mathematics)|lifts]].
 
In order to perform this matching, Wiles had to create a [[class number formula]] (CNF). He first attempted to use horizontal Iwasawa theory but that part of his work had an unresolved issue such that he could not create a CNF. At the end of the summer of 1991, he learned about a paper by Matthias Flach, using ideas of [[Victor Kolyvagin]] to create a CNF, and so Wiles set his Iwasawa work aside. Wiles extended Flach's work in order to create a CNF. By the spring of 1993, his work covered all but a few families of elliptic curves. In early 1993, Wiles reviewed his argument beforehand with a Princeton colleague, [[Nick Katz]]. His proof involved extending approaches which had recently been developed by  Kolyvagin and Flach,<ref>[[Simon Singh|Singh, Simon]]. ''[[Fermat's Last Theorem]]'', 2002, p. 259.</ref> which he adopted after the Iwasawa method failed.<ref>Singh, Simon. ''Fermat's Last Theorem'', 2002, p. 260.</ref> In May 1993 while reading a paper by Mazur, Wiles had the insight that the 3/5 switch would resolve the final issues and would then cover all elliptic curves (again, see Chapter 5 of the paper for this 3/5 switch).
 
===General approach and strategy===
Given an elliptic curve ''E'' over the field '''Q''' of rational numbers <math> E(\bar{\mathbf{Q}}) </math>, for every prime power <math>l^n</math>, there exists a [[homomorphism]] from the [[absolute Galois group]]
:<math> \mathrm{Gal}(\bar{\mathbf{Q}}/\mathbf{Q}) </math>
to
:<math> \mathrm{GL}_2(\mathbf{Z}/l^n \mathbf{Z}) </math>,
the group of [[Invertible matrix|invertible]] 2 by 2 matrices whose entries are integers (<math>\mod l^n</math>).  This is because <math>E(\bar{\mathbf{Q}})</math>, the points of ''E'' over <math>\bar{\mathbf{Q}}</math>, form an [[abelian group]], on which <math>\mathrm{Gal}(\bar{\mathbf{Q}}/\mathbf{Q})</math> acts; the subgroup of elements ''x'' such that <math>l^n x = 0</math> is just <math>(\mathbf{Z}/l^n \mathbf{Z})^2</math>, and an [[automorphism]] of this group is a matrix of the type described.
 
Less obvious is that given a modular form of a certain special type, a [[Hecke eigenform]] with eigenvalues in '''Q''', one also gets a homomorphism from the absolute Galois group
:<math>\mathrm{Gal}(\bar{\mathbf{Q}}/\mathbf{Q}) \rightarrow \mathrm{GL}_2(\mathbf{Z}/l^n \mathbf{Z})</math>.:
This goes back to Eichler and Shimura.  The idea is that the Galois group acts first on the modular curve on which the modular form is defined, thence on the [[Jacobian variety]] of the curve, and finally on the points of <math>l^n</math> power order on that Jacobian.  The resulting representation is not usually 2-dimensional, but the [[Hecke operator]]s cut out a 2-dimensional piece.  It is easy to demonstrate that these representations come from some elliptic curve but the converse is the difficult part to prove.
 
Instead of trying to go directly from the elliptic curve to the modular form, one can first pass to the (<math>\mod l^n</math>) representation for some ''l'' and ''n'', and from that to the modular form.  In the case ''l''=3 and ''n''=1, results of the [[Langlands–Tunnell theorem]] show that the (mod 3) representation of any elliptic curve over '''Q''' comes from a modular form. The basic strategy is to use induction on ''n'' to show that this is true for ''l''=3 and any ''n'', that ultimately there is a single modular form that works for all n.  To do this, one uses a counting argument, comparing the number of ways in which one can [[Lift (mathematics)|lift]] a (<math>\mod l^n</math>) Galois representation to (<math>\mod l^{n+1}</math>) and the number of ways in which one can lift a (<math>\mod l^n </math>) modular form.  An essential point is to impose a sufficient set of conditions on the Galois representation; otherwise, there will be too many lifts and most will not be modular.  These conditions should be satisfied for the representations coming from modular forms and those coming from elliptic curves.  If the original (mod 3) representation has an image which is too small, one runs into trouble with the lifting argument, and in this case, there is a final trick, which has since taken on a life of its own with the subsequent work on the [[Serre conjecture (number theory)|Serre Modularity Conjecture]].  The idea involves the interplay between the (mod 3) and (mod 5) representations. See Chapter 5 of the Wiles paper for this 3/5 switch.
 
===Structure of Wiles' proof===
In his 1995 108-page article, Wiles divides the subject matter up into the following chapters (preceded here by page numbers):
:Introduction
::443
:Chapter 1
::455 1. Deformations of Galois representations
::472 2. Some computations of [[cohomology]] groups
::475 3. Some results on subgroups of GL<sub>2</sub>(k)
:Chapter 2
::479 1. The [[Gorenstein ring|Gorenstein]] property
::489 2. Congruences between Hecke rings
::503 3. The main conjectures
:Chapter 3
::517 Estimates for the [[Selmer group]]
:Chapter 4
::525 1. The ordinary [[complex multiplication|CM]] case
::533 2. Calculation of η
:Chapter 5
::541 Application to [[elliptic curve]]s
:Appendix
::545 Gorenstein rings and local complete intersections
 
[[Gerd Faltings]] subsequently provided some simplifications to the 1995 proof, primarily in switch from geometric constructions to rather simpler algebraic ones.<ref>[http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Fermat%27s_last_theorem.html Fermat's Last Theorem] at MacTutor</ref><ref>[http://www.mcs.csuhayward.edu/~malek/Mathlinks/Lasttheorem.html Fermat's Last Theorem] 1996</ref>  The book of the Cornell conference also contained simplifications to the original proof.<ref name="CornellBook"/>
 
===Reading and notation guide===
Wiles' paper is over 100 pages long and often uses the specialized symbols and notations of [[group theory]], [[algebraic geometry]], [[commutative algebra]], and [[Galois theory]].
 
One might want to first read the 1993 email of [[Ken Ribet]],<ref>[http://www.faqs.org/faqs/sci-math-faq/FLT/Wiles/ FAQ: Wiles attack] June 1993</ref><ref>[http://www.dms.umontreal.ca/~andrew/PDF/FLTatlast.pdf Fermat's Last Theorem a Theorem at last] August 1993</ref> Hesselink's quick review of top-level issues, which gives just the elementary algebra and avoids abstract algebra,<ref>[http://www.cs.rug.nl/~wim/fermat/wilesEnglish.html#a3 How does Wiles prove Fermat's Last Theorem?] by Wim H. Hesselink</ref> or Daney's web page which provides a set of his own notes and lists the current books available on the subject. Weston attempts to provide a handy map of some of the relationships between the subjects.<ref>[http://www.math.umass.edu/~weston/rs/map.html Research Summary Topics]</ref> F. Q. Gouvêa provides an award-winning review of some of the required topics.<ref>[http://www.joma.org/images/upload_library/22/Ford/Gouvea203-222.pdf A Marvelous Proof] Fernando Gouvêa, The American Mathematical Monthly, vol. 101, 1994, pp. 203–222
</ref><ref>[http://www.d.umn.edu/~jgallian/maaawards/ford.html The Mathematical Association of America's Lester R. Ford Award]</ref><ref>[http://ps.uci.edu/news/Discover.2006.2007.pdf Year of Award: 1995]</ref><ref>[http://mathdl.maa.org/mathDL/22/?pa=content&sa=viewDocument&nodeId=2906 MAA Writing Awards, 1995]</ref> Faltings' 5-page technical bulletin on the matter is a quick and technical review of the proof for the non-specialist.<ref>[http://www.ams.org/notices/199507/faltings.pdf Gerd Faltings, ''The Proof of Fermat’s Last Theorem by R. Taylor and A. Wiles'', Notices of the AMS, 42/7]</ref> For those in search of a commercially available book to guide them, he recommended that those familiar with abstract algebra read Hellegouarch, then read the Cornell book,<ref name="CornellBook">G. Cornell, J. H. Silverman and
G. Stevens, ''Modular forms and Fermat's Last Theorem'', ISBN 0-387-94609-8</ref> which is claimed to be accessible to "a graduate student in number theory". Note that not even the Cornell book can cover the entirety of the Wiles proof.<ref name=AMS-review />
 
The work of almost every mathematician who helped to lay the groundwork for Wiles did so in specialized ways, often creating new specialized concepts and yet more new [[jargon]]. In the equations, subscripts and superscripts are used extensively because of the numbers of concepts that Wiles is sometimes dealing with in an equation.
*See the glossaries listed in [[Lists of mathematics topics#Pure mathematics]], such as [[Glossary of arithmetic and Diophantine geometry]] . Daney provides a [http://cgd.best.vwh.net/home/flt/flt10.htm proof-specific glossary].
*See [[Table of mathematical symbols]] and [[Table of logic symbols]]
*For the deformation theory, Wiles defines restrictions (or cases) on the deformations as Selmer (sel), ordinary (ord), strict (str) or flat (fl) and he uses the abbreviations list here. He usually uses these as a subscript but he occasionally uses them as a superscript. There is also a fifth case: the implied "unrestricted" case but note that the superscript "unr" is not an abbreviation for unrestricted.
*Q<sup>unr</sup> is the [[ramification|unramified]] extension of Q. A related but more specialized topic used is [[crystalline cohomology]]. See also [[Galois cohomology]].
*Some relevant named concepts: [[Hasse–Weil zeta function]], [[Mordell–Weil theorem]], Deligne–Serre theorem
*Grab bag of jargon mentioned in paper: [[Cover (topology)|cover]] and [[Lift (mathematics)|lift]], [[finite field]], [[isomorphism]], [[surjective function]], [[decomposition group]], [[j-invariant]] of elliptic curves, [[Abelian group]], [http://planetmath.org/encyclopedia/Grossencharacter2.html Grossencharacter], [[L-function]], [[abelian variety]], [[Jacobian matrix and determinant|Jacobian]], [[Néron model]], [[Gorenstein ring]], [[Torsion subgroup]] (including torsion points on elliptic curves here<ref>http://mat.uab.es/~xarles/elliptic.html</ref> and here<ref>http://planetmath.org/encyclopedia/ArithmeticOfEllipticCurves.html</ref>), [[Congruence subgroup]], [http://mathworld.wolfram.com/Eigenform.html eigenform], [[Character (mathematics)]], [[Irreducibility (mathematics)]], [[Image (mathematics)]], [[dihedral group|dihedral]], [http://planetmath.org/encyclopedia/ConductorOfAnEllipticCurve.html Conductor], [[Lattice (group)]], [[Cyclotomic field]], [[Cyclotomic character]], [[Splitting of prime ideals in Galois extensions]] (and decomposition group and inertia group), [[Quotient space]], [[Quotient group]]
 
==Announcement and subsequent developments==
Wiles' proof was initially presented in 1993. It was finally accepted as correct, and published, in 1995, because of an error in one piece of his initial paper. His work was extended to a full proof of the modularity theorem over the following 6 years by others, who built on Wiles' work.
 
===Announcement and final proof (1993–1995)===
During June 21 – 23, 1993, Wiles announced and presented his proof of the Taniyama–Shimura conjecture for semi-stable elliptic curves, and hence of Fermat's Last Theorem, over the course of three lectures delivered at the [[Isaac Newton Institute for Mathematical Sciences]] in [[Cambridge, England]].<ref name=nyt/> There was a relatively large amount of press coverage afterwards.<ref name=AMS-review>[http://www.ams.org/bull/1999-36-02/S0273-0979-99-00778-8/S0273-0979-99-00778-8.pdf AMS book review] Modular forms and Fermat's Last Theorem by Cornell et al., 1999</ref>
 
After the announcement, Katz was appointed as one of the referees to [[peer review]] Wiles' manuscript. In the course of his review, he asked Wiles a series of clarifying questions that led Wiles to recognize that the proof contained a gap. There was an error in one critical portion of the proof which gave a bound for the order of a particular group: the [[Euler system]] used to extend Flach's method was incomplete. The error would not have rendered his work worthless – each part of Wiles' work was highly significant and innovative by itself, as were the many developments and techniques he had created in the course of his work, and only one part was affected.<ref name="Singh">[Fermat's Last Theorem, Simon Singh, 1997, ISBN 1-85702-521-0</ref>{{rp|289, 296–297}} However without this part proven, there was no actual proof of Fermat's Last Theorem.
 
Wiles and his former student [[Richard Taylor (mathematician)|Richard Taylor]] spent almost a year resolving this issue.<ref>[http://www.nytimes.com/1994/06/28/science/a-year-later-snag-persists-in-math-proof.html A Year Later, Snag Persists In Math Proof] June 28, 1994</ref><ref>[http://www.nytimes.com/1994/07/03/weekinreview/june-26-july-2-a-year-later-fermat-s-puzzle-is-still-not-quite-qed.html June 26 – July 2; A Year Later Fermat's Puzzle Is Still Not Quite Q.E.D.] July 3, 1994</ref> Wiles indicates that on the morning of September 19, 1994 he realized that the specific reason why the Flach approach would not work directly suggested a new approach based on his previous attempts using Iwasawa theory, which resolved the issue and resulted in a CNF that was valid for all of the required cases. On October 6 Wiles sent the new proof to three colleagues including Faltings,{{cn|date=May 2013}} and on 24 October 1994, Wiles submitted two manuscripts, "Modular elliptic curves and Fermat's Last Theorem"<ref>{{cite journal|last=Wiles|first=Andrew|authorlink=Andrew Wiles|year=1995|title=Modular elliptic curves and Fermat's Last Theorem|url=http://math.stanford.edu/~lekheng/flt/wiles.pdf|journal=Annals of Mathematics|volume=141|issue=3|pages=443–551|oclc=37032255|format=PDF|doi=10.2307/2118559|jstor=2118559|publisher=Annals of Mathematics}}</ref> and "Ring theoretic properties of certain Hecke algebras",<ref>{{cite journal | author = [[Richard Taylor (mathematician)|Taylor R]], [[Andrew Wiles|Wiles A]] | year = 1995 | journal = Annals of Mathematics | title = Ring theoretic properties of certain Hecke algebras | volume = 141 | issue = 3| pages = 553–572 | oclc = 37032255 | url = http://www.math.harvard.edu/~rtaylor/hecke.ps | doi = 10.2307/2118560 | jstor = 2118560 | publisher = Annals of Mathematics}}</ref> the second of which was co-authored with Taylor and proved that certain conditions were met which were needed to justify the corrected step in the main paper.
 
The two papers were vetted and finally published as the entirety of the May 1995 issue of the ''[[Annals of Mathematics]]''. The new proof was widely analyzed, and became accepted as likely correct in its major components.<ref>NOVA Video, [http://www.pbs.org/wgbh/nova/transcripts/2414proof.html The Proof] October 28, 1997, See also [http://www.pbs.org/wgbh/nova/proof/wiles.html Solving Fermat: Andrew Wiles]</ref><ref>[http://cgd.best.vwh.net/home/flt/flt08.htm The Proof of Fermat's Last Theorem] Charles Daney, 1996</ref> These papers established the modularity theorem for semistable elliptic curves, the last step in proving Fermat's Last Theorem, 358 years after it was conjectured.
 
===Popular accessibility===
Fermat himself famously claimed to ''"...have discovered a truly marvelous proof of this, which this margin is too narrow to contain"'',<ref>[http://www.csmonitor.com/Science/2011/0817/Why-Pierre-de-Fermat-is-the-patron-saint-of-unfinished-business "Why Pierre de Fermat is the patron saint of unfinished business"], Eoin O'Carroll, 17 August 2011, csmonitor.com</ref> but Wiles's proof is very complex, and incorporates the work of so many other specialists that it was suggested in 1994 that only a small number of people were capable of fully understanding at that time all the details of what he had done.<ref name=nyt/><ref>[http://math.albany.edu:8010/g/Math/topics/fermat/granville.hist  History of Fermat's Last Theorem] Andrew Granville, Jun 24, 1993</ref> The number is likely much larger now with the 10-day conference and book organized by Cornell ''et al.'',<ref name="CornellBook"/> which has done much to make the full range of required topics accessible to graduate students in number theory.
 
In 1998, the full modularity theorem was proven by [[Christophe Breuil]], [[Brian Conrad]], [[Fred Diamond]], and [[Richard Taylor (mathematician)|Richard Taylor]] using many of the methods that Andrew Wiles used in his 1995 published papers.
 
A [[computer science]] challenge given in 2005 is "Formalize and verify by computer a proof of Fermat's Last Theorem, as proved by A. Wiles in 1995."<ref>[http://www.cs.rug.nl/~wim/fermat/wilesEnglish.html Computer verification of Wiles's proof of Fermat's Last Theorem]</ref>
 
==Notes==
{{reflist|30em}}
 
==References==
* {{cite book | last = Aczel | first = Amir | title = Fermat's Last Theorem: Unlocking the Secret of an Ancient Mathematical Problem | date = January 1, 1997 | isbn = 978-1-56858-077-7 | zbl = 0878.11003}}
* {{cite journal | author = [[John Coates (mathematician)|John Coates]] |date=July 1996 | title = Wiles Receives NAS Award in Mathematics | journal = Notices of the AMS | volume = 43 | issue = 7 | pages = 760–763 | url = http://www.ams.org/notices/199607/comm-wiles.pdf |format=PDF | zbl = 1029.01513}}
* {{cite book | last = Cornell | first = Gary | title = Modular Forms and Fermat's Last Theorem | date = January 1, 1998 | isbn = 0-387-94609-8 | zbl = 0878.11004}} (Cornell, et al.)
* {{cite web|author=Daney, Charles|year=2003 | url=http://cgd.best.vwh.net/home/flt/flt01.htm| title=The Mathematics of Fermat's Last Theorem|accessdate=August 5, 2004}}
* {{cite web|last=Darmon|first=H.|authorlink=Henri Darmon|url=http://www.math.mcgill.ca/darmon/pub/Articles/Expository/03.BU-FLT/paper.pdf|title= Wiles’ theorem and the arithmetic of elliptic curves| date=September 9, 2007}}
* {{cite journal |last=Faltings|first=Gerd|date=July 1995|url=http://www.ams.org/notices/199507/faltings.pdf|format=PDF|title=The Proof of Fermat's Last Theorem by R. Taylor and A. Wiles|journal=Notices of the AMS|volume=42|issue=7|pages=743–746|issn=0002-9920 | zbl = 1047.11510}}
* {{cite journal|last=Frey|first=Gerhard|year=1986|title=Links between stable elliptic curves and certain diophantine equations|journal=Ann. Univ. Sarav. Ser. Math.|volume=1|pages=1–40 | zbl = 0586.10010}}
* {{cite book | last = Hellegouarch | first = Yves | title =  Invitation to the Mathematics of Fermat–Wiles | date = January 1, 2001 | isbn = 0-12-339251-9 | zbl = 0887.11003}} See [http://www.maa.org/reviews/fermatwiles.html  review]
* {{cite web|url=http://math.stanford.edu/~lekheng/flt/| title=The bluffer's guide to Fermat's Last Theorem}} (collected by Lim Lek-Heng)
* {{cite book|last=Mozzochi|first=Charles | title=The Fermat Diary | date=December 7, 2000 | isbn=978-0-8218-2670-6|publisher=American Mathematical Society | zbl = 0955.11002}} (see [http://www.americanscientist.org/bookshelf/pub/wiless-proof-1993-1995 book review]
* {{cite book|last=Mozzochi|first=Charles | title=The Fermat Proof | date=July 6, 2006 | isbn=1-4120-2203-7|publisher=Trafford Publishing| zbl = 1104.11001}}
* {{cite web| last=O'Connor|first=J. J. |coauthors=Robertson, E. F.|year=1996|url=http://www-gap.dcs.st-and.ac.uk/~history/HistTopics/Fermat's_last_theorem.html|title=Fermat's last theorem|accessdate=August 5, 2004}}
* {{cite book | last = van der Poorten | first = Alfred | title = Notes on Fermat's Last Theorem | date = January 1, 1996 | isbn = 0-471-06261-8 | zbl = 0882.11001}}
* {{cite book | last = Ribenboim | first = Paulo | title = Fermat's Last Theorem for Amateurs | date = January 1, 2000 | isbn = 0-387-98508-5 | zbl = 0920.11016}}
* {{cite web|author=Ribet, Ken| year=1995| url=http://math.stanford.edu/~lekheng/flt/ribet.pdf |title=Galois representations and modular forms|format=PDF}} Discusses various material which is related to the proof of Fermat's Last Theorem: elliptic curves, modular forms, Galois representations and their deformations, Frey's construction, and the conjectures of Serre and of Taniyama–Shimura.
* {{cite book |last=Singh|first=Simon|authorlink=Simon Singh|title=[[Fermat's Enigma]]|date=October 1998|publisher=Anchor Books|location=New York|isbn=978-0-385-49362-8 | zbl = 0930.00002}}
* Simon Singh {{cite web |url=http://www.simonsingh.net/books/fermats-last-theorem/the-whole-story/| title=The Whole Story}} Edited version of ~2,000-word essay published in Prometheus magazine, describing Andrew Wiles's successful journey.
* {{cite journal | author = [[Richard Taylor (mathematician)|Richard Taylor]] and Andrew Wiles |date=May 1995 | title = Ring-theoretic properties of certain Hecke algebras | journal = Annals of Mathematics | volume = 141 | issue = 3 | pages = 553–572 | url = http://math.stanford.edu/~lekheng/flt/taylor-wiles.pdf | doi = 10.2307/2118560 |format=PDF | issn=0003486X|oclc=37032255 | publisher = Annals of Mathematics | jstor = 2118560 | zbl = 0823.11030}}
* {{cite journal|last=Wiles|first=Andrew|authorlink=Andrew Wiles|year=1995|title=Modular elliptic curves and Fermat's Last Theorem|url=http://math.stanford.edu/~lekheng/flt/wiles.pdf|journal=Annals of Mathematics | volume=141 | issue=3|pages=443–551|issn=0003486X|oclc=37032255|format=PDF | doi = 10.2307/2118559|publisher=Annals of Mathematics|jstor=2118559 | zbl = 0823.11029 }} See also this smaller and searchable [http://users.tpg.com.au/nanahcub/flt.pdf PDF text version]. (The larger PDF misquotes the volume number as 142.)
 
==External links==
* {{MathWorld | urlname=FermatsLastTheorem| title=Fermat's Last Theorem}}
* {{cite web |url=http://www.pbs.org/wgbh/nova/proof/| title=The Proof}} The title of one edition of the PBS television series NOVA, discusses Andrew Wiles's effort to prove Fermat's Last Theorem broadcast on BBC Horizon and [[UTV (TV channel)|UTV]]/Documentary series as {{google video | id = 8269328330690408516 | title = Fermat's Last Theorem }} 1996
* [http://math.albany.edu:8010/g/Math/topics/fermat/ Wiles, Ribet, Shimura–Taniyama–Weil and Fermat's Last Theorem]
*[http://www.sciam.com/article.cfm?id=are-mathematicians-finall Are mathematicians finally satisfied with Andrew Wiles's proof of Fermat's Last Theorem? Why has this theorem been so difficult to prove?], ''[[Scientific American]]'', October 21, 1999
 
[[Category:Galois theory]]
[[Category:Fermat's Last Theorem]]

Latest revision as of 01:52, 11 June 2014

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