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math.GR2009
Quasimorphisms and laws
Danny Calegari
Stable commutator length vanishes in any group that obeys a law.
math.GR2009★ 9 cited
Scl, sails and surgery
Danny Calegari
We establish a close connection between stable commutator length in free groups and the geometry of sails (roughly, the boundary of the convex hull of the set of integer lattice po…