Quasi-homomorphisms and stable lengths in mapping class groups
classification
🧮 math.GR
math.GT
keywords
classgroupsmappingquasi-homomorphismsapplicationscaseconcernselement
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We give elementary applications of quasi-homomorphisms to growth problems in groups. A particular case concerns the number of torsion elements required to factorise a given element in the mapping class group of a surface.
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