The Gross - Kuz'min conjecture for CM fields

Details The Gross - Kuz'min conjecture for CM fields The Gross - Kuz'min conjecture for CM fields

2011-07-06

arxiv.org/abs/1107.1146v1

Mathematics

Number Theory

Scientific paper

Let $A' = \varprojlim_n$ be the projective limit of the $p$-parts of the ideal class groups of the $p$ integers in the $\Z_p$-cyclotomic extension $\K_{\infty}/\K$ of a CM number field $\K$. We prove in this paper that the $T$ part $(A')^-(T) = 0$. This fact has been explicitly conjecture by Kuz'min in 1972 and was proved by Greenberg in 1973, for abelian extensions $\K/\Q$. Federer and Gross had shown in 1981 that $(A')^-(T) = 0$ is equivalent to the non-vanishing of the $p$-adic regulator of the $p$-units of $\K$.

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