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University of Cambridge > Talks.cam > Number Theory Seminar > Functoriality of the Canonical Fractional Galois Ideal

## Functoriality of the Canonical Fractional Galois IdealAdd to your list(s) Download to your calendar using vCal - Victor Snaith
- Tuesday 06 May 2008, 14:30-15:30
- MR13.
If you have a question about this talk, please contact Tim Dokchitser. A famous conjecture in number theory is the Stark conjecture, which concerns the leading term of the Taylor series for Artin L-functions at s=0. A few years ago, en route to giving a proof of the Coates-Sinnott conjecture, I constructed a canonical fractional ideal inside the rational group-ring of a finite, abelian Galois group of a number field extension. It’s role in life was to annihilate algebraic K-groups of number rings, in a way which imitated and extended Stickelberger’s famous theorem from the 1890’s. Recently, in number theory, several people have been studying non-commutative Iwasawa theory. In this one makes an Iwasawa algebra out of an infinite Galois extension with such Galois groups as GLnZp. This talk will (i) describe the canonical (abelian) fractional Galois ideal (ii) its naturality properties (iii) how to make a canonical non-abelian fractional Galois ideal and (iv) it leads conjecturally to a two-sided ideal in the Iwasawa algebra. This is joint work with Paul Buckingham. This talk is part of the Number Theory Seminar series. ## This talk is included in these lists:- All CMS events
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