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Morse theory, random subgraphs, and incoherent groups
Author(s) -
Wise Daniel T.
Publication year - 2011
Publication title -
bulletin of the london mathematical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.396
H-Index - 48
eISSN - 1469-2120
pISSN - 0024-6093
DOI - 10.1112/blms/bdr023
Subject(s) - mathematics , morse code , kleinian group , finitely generated abelian group , pure mathematics , combinatorics , computer science , telecommunications
We prove that certain polygons of finite groups have finitely generated infinite index normal subgroups, and are hence incoherent. This gives a new family of incoherent Kleinian groups. The method of proof suggests an effective approach toward related problems.