CAT(0) Cube Complexes and Low Dimensional Cohomology
Connections for Women: Geometric Group Theory August 17, 2016 - August 19, 2016
Location: SLMath:
geometric group theory
CAT(0) space
cube complex
rigidity results
lattices in Lie groups
solvable groups
discrete group actions
cohomology theory
manifolds with boundary
amenable groups
Lipschitz continuity
20Jxx - Connections of group theory with homological algebra and category theory
00A35 - Methodology of mathematics {For mathematics education, see 97-XX}
14580
CAT(0) cube complexes are charming objects with many striking properties. For example, they admit two interesting, and naturally coupled metrics: the CAT(0) metric and the median metric, allowing one to access the rich tools from each of those worlds. The study of low dimensional cohomology of a group touches upon several important aspects of group theory: Property (T), the Haagerup Property, stable commutator length, and even superrigidity. In this talk, we will discuss CAT(0) cube complexes, and how they provide a nice framework for finding low dimensional cohomology classes such as the Haagerup Cocycle and various generalization of the Brooks cocycle.
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