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math.AT2019★ 2 cited
A remark on the Mayer-Vietoris double complex for singular cohomology
Roberto Frigerio, Andrea Maffei
Given an open cover of a paracompact topological space X, there are two natural ways to construct a map from the cohomology of the nerve of the cover to the cohomology of X. One of…
math.AT2019
Amenable covers and l^1-invisibility
Roberto Frigerio
Let be a topological space admitting an amenable cover of multiplicity . We show that, for every and every , the image of …
math.AT2016
Bounded cohomology of discrete groups
Roberto Frigerio
Bounded cohomology of groups was first defined by Johnson and Trauber during the seventies in the context of Banach algebras. As an independent and very active research field, howe…