Mild pro-p-groups with 4 generators
Michael R. Bush, John Labute
Abstract
Let p be an odd prime and S a finite set of primes = 1 mod p. We give an effective criterion for determining when the Galois group G=GS(p) of the maximal p-extension of Q unramified outside of S is mild when |S|=4 and the cup product H1(G,Z/pZ) H1(G,Z/pZ) --> H2(G,Z/pZ) is surjective.
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