2 papers
math.GT2018
Equivariant group presentations and the second homology group of the Torelli group
Martin Kassabov, Andrew Putman
We develop a theory of equivariant group presentations and relate them to the second homology group of a group. Our main application says that the second homology group of the Tore…
math.GT2018
Surface groups, infinite generating sets, and stable commutator length
Dan Margalit, Andrew Putman
We give a new proof of a theorem of D. Calegari that says that the Cayley graph of a surface group with respect to any generating set lying in finitely many mapping class group orb…