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Generating Sets and Algebraic Properties of Pure Mapping Class Groups of Infinite Graphs

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arxiv 2309.07885 v1 pith:MC2AF4BR submitted 2023-09-14 math.GR math.GT

classification math.GRmath.GT
keywords algebraicclassgroupsmappingpureclassifygeneratinggraphs
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We completely classify the locally finite, infinite graphs with pure mapping class groups admitting a coarsely bounded generating set. We also study algebraic properties of the pure mapping class group: We establish a semidirect product decomposition, compute first integral cohomology, and classify when they satisfy residual finiteness and the Tits alternative. These results provide a framework and some initial steps towards quasi-isometric and algebraic rigidity of these groups.

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  1. Graphical models for topological groups: A case study on countable Stone spaces

    math.GR 2024-11 conditional novelty 6.0 of 10

    The paper defines Cayley-Abels-Rosendal graphs for Polish groups and uses them to classify when homeomorphism groups of countable Stone spaces are coarsely bounded, locally bounded, and boundedly generated.

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