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n-Nilpotent Obstructions to pi_1 Sections of P^1-{0,1,infty} and Massey Products
Massey products Group/Galois cohomology Section conjecture Lower central series
2011/8/31
Abstract: Let pi be a pro-l completion of a free group, and let G be a profinite group acting continuously on pi. First suppose the action is given by a character. Then the boundary maps delta_n: H^1(...