The Euler system of cyclotomic units and higher Fitting ideals

Details The Euler system of cyclotomic units and higher Fitting ideals The Euler system of cyclotomic units and higher Fitting ideals

2009-12-24

arxiv.org/abs/0912.4854v2

Mathematics

Number Theory

30 pages

Scientific paper

Kurihara established a refinement of the minus-part of the Iwasawa main conjecture for totally real number fields using the higher Fitting ideals. In this paper, we study the higher Fitting ideals of the plus-part of the Iwasawa module associated to the cyclotomic Z_p-extension of Q(\mu_p) for an odd prime number p by similar methods as in Kurihara's work. We define the higher cyclotomic ideals C_i, which are ideals of the Iwasawa algebra defined by the Kolyvagin derivatives of cyclotomic units, and prove that they give upper bounds of the higher Fitting ideals. Our result can be regarded as a refinement of the plus-part of the Iwasawa main conjecture for Q.

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