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Relative K0, annihilators, Fitting ideals and the Stickelberger phenomena

Victor Snaith

math.NTarXiv:math/0203293

Abstract

When G is abelian and l is a prime we show how elements of the relative K-group K0( Zl[G], Ql) give rise to annihilator/Fitting ideal relations of certain associated Z[G]-modules. Examples of this phenomenon are ubiquitous. Particularly, we give examples in which G is the Galois group of an extension of global fields and the resulting annihilator/Fitting ideal relation is closely connected to Stickelberger's Theorem and to the conjectures Coates-Sinnott and Brumer.

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