most citedGroup-theoretic Johnson classes and a non-hyperelliptic curve with torsion Ceresa class

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math.AG2020★ 6 cited

Group-theoretic Johnson classes and a non-hyperelliptic curve with torsion Ceresa class

Dean Bisogno, Wanlin Li, Daniel Litt +1

Let l be a prime and G a pro-l group with torsion-free abelianization. We produce group-theoretic analogues of the Johnson/Morita cocycle for G -- in the case of surface groups, th…