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September 11, 2009
Friday, September 11
Algebra Seminar
Time: 14:30
Speaker: Emre Coskun (Western)
Title: "The Fine Moduli Space of Representations of Clifford Algebras, Part 1"
Room: MC108

Abstract: Given a fixed binary form f(u,v) of degree d over a field k, the associated Clifford algebra is the k-algebra Cf=k{u,v}/I, where I is the two-sided ideal generated by elements of the form (αu+βv)df(α,β) with α and β arbitrary elements in k. All representations of Cf have dimensions that are multiples of d, and occur in families. In this article we construct fine moduli spaces U=Uf,r for the rd-dimensional representations of Cf for each r2. Our construction starts with the projective curve CP2k defined by the equation wd=f(u,v), and produces Uf,r as a quasiprojective variety in the moduli space M(r,dr) of stable vector bundles over C with rank r and degree dr=r(d+g1), where g denotes the genus of C.