Generating the Johnson filtration II: finite generation
classification
🧮 math.GT
math.GR
keywords
groupjohnsonautomorphismcentralclasscommutatorershov-heevery
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We prove that every term of the lower central series and Johnson filtrations of the Torelli subgroups of the mapping class group and the automorphism group of a free group are finitely generated in a stable range. This was originally proved for the commutator subgroup by Ershov-He.
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