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- Newsgroups: sci.math
- Path: sparky!uunet!pipex!pavo.csi.cam.ac.uk!gjm11
- From: gjm11@cus.cam.ac.uk (G.J. McCaughan)
- Subject: Re: Frankly,my dear......was: Fermat's Last Theorem
- Message-ID: <1993Jan9.143414.29684@infodev.cam.ac.uk>
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- Organization: U of Cambridge, England
- References: <1993Jan7.021308.10566@nuscc.nus.sg> <1993Jan7.171719.28657@infodev.cam.ac.uk> <1993Jan8.162334.31486@austin.onu.edu>
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- Date: Sat, 9 Jan 1993 14:34:14 GMT
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-
- In article <1993Jan8.162334.31486@austin.onu.edu> yeomans@austin.onu.edu (Charles Yeomans) writes:
- >In article <1993Jan7.171719.28657@infodev.cam.ac.uk>, gjm11@cus.cam.ac.uk (G.J. McCaughan) writes:
- >> [stuff omitted]
- >
- >> * Work on FLT was one of the big motivators for the theory of ideals. I don't
- >> call that trivial, boring, or even "recreational".
- >>
- >It's not so clear that this is historically accurate. Kummer was
- >motivated to introduce ideal numbers - out of which came the theory of
- >ideals, etc. - as a consequence of his work on higher reciprocity laws-
- >a subject which was intensely studied in the 19th century, is largely
- >ignored today because these laws are now a part of class field theory.
- >I believe it was while studying reciprocity that Kummer was forced to
- >consider problems of nonunique factorization. On the other hand, it
- >was Lame who proposed the idea of factoring the Fermat equation over a
- >cyclotomic field, but who didn't see that there was a problem with
- >unique factorization.
-
- OK; perhaps I was wrong. I thought that Kummer at one stage thought he
- had a proof of FLT, but then noticed that it was wrong because of the
- possible failure of unique factorisation. But I'm no expert on the
- history of this sort of thing, so you're probably right.
-
- --
- Gareth McCaughan Dept. of Pure Mathematics & Mathematical Statistics,
- gjm11@cus.cam.ac.uk Cambridge University, England. [Research student]
-