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math.GT2018
Big Torelli groups: generation and commensuration
Javier Aramayona, Tyrone Ghaswala, Autumn E. Kent +3
For any surface of infinite topological type, we study the Torelli subgroup of the mapping class group , whose elements are those mapping classe…
math.GT2018
Geometric normal subgroups in mapping class groups of punctured surfaces
Alan McLeay
We prove that many normal subgroups of the extended mapping class group of a surface with punctures are geometric, that is, that their automorphism groups and abstract commensurato…
math.GT2018
Mapping class groups of covers with boundary and braid group embeddings
Tyrone Ghaswala, Alan McLeay
We consider finite-sheeted, regular, possibly branched covering spaces of compact surfaces with boundary and the associated liftable and symmetric mapping class groups. In particul…