Abstract

Let G G be a pro- p p group and g ∈ H 1 ( G ) g \in {H^1}(G) . We give a group-theoretic description of the kernel of the cup product — − âˆȘ g : H 1 ( G ) → H 2 ( G ) - \cup g:{H^1}(G) \to {H^2}(G) .

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