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math.GR2013
Combination of classifying spaces for proper actions
Alexandre Martin
Given a group action on a simplicial complex such that each simplex stabiliser admits a cocompact model of classifying space for proper actions, we give conditions implying the exi…
math.GR2013
Complexes of groups and geometric small cancellation over graphs of groups
Alexandre Martin
We explain and generalise a construction due to Gromov to realise geometric small cancellation groups over graphs of groups as fundamental groups of non-positively curved 2-dimensi…