Christopher Wulff

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20112025

most citedEquivariant Coarse (Co-)Homology Theories

5 citations · 13 across the 9 of their papers we have counts for

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math.AT2020★ 2 cited

Secondary cup and cap products in coarse geometry

Christopher Wulff

We construct secondary cup and cap products on coarse (co-)homology theories from given cross and slant products. They are defined for coarse spaces relative to weak generalized co…

math.AT2020★ 5 cited

Equivariant Coarse (Co-)Homology Theories

Christopher Wulff

We present an Eilenberg-Steenrod-like axiomatic framework for equivariant coarse homology and cohomology theories. We also discuss a general construction of such coarse theories fr…

math.AT2016

A geometric proof of Lück's vanishing theorem for the first $L^{2}$ -Betti number of the total space of a fibration

Christopher Wulff

A significant theorem of Lück says that the first $L^{2}$ -Betti number of the total space of a fibration vanishes under some conditions on the fundamental groups. The proof is based…

Secondary cup and cap products in coarse geometry

Equivariant Coarse (Co-)Homology Theories

A geometric proof of Lück's vanishing theorem for the first L2-Betti number of the total space of a fibration

A geometric proof of Lück's vanishing theorem for the first $L^{2}$ -Betti number of the total space of a fibration