Abstract

Let l be an odd prime number and K ∞/k a Galois extension of totally real number fields, with and K ∞/k ∞ finite, where k ∞ is the cyclotomic -extension of k. The ``main conjecture'' of equivariant Iwasawa theory, as formulated in [RW2], is, up to its uniqueness statement, reduced to the existence of a nonabelian pseudomeasure whenever G ∞=G(K ∞/k) is an l-group and Iwasawa's μ-invariant vanishes. This follows from combining the validity of the conjecture in the maximal order case with special congruences. The main tool of proof is a generalization of the Taylor-Oliver integral group logarithm so that it applies to the setting of Iwasawa theory.

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