# Mathematics Colloquia and Seminars

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### Lattices acting on symmetric polygonal complexes

**Geometry/Topology**

Speaker: | Anne Thomas, University of Chicago |

Location: | 2112 MSB |

Start time: | Wed, May 16 2007, 4:10PM |

Let G be a locally compact topological group. A discrete subgroup Gamma of G is called a lattice if the quotient G/Gamma has finite volume. We study lattices in G the automorphism group of a locally finite polygonal complex. Cases considered include right-angled and hyperbolic buildings, as well as certain non-buildings with links such as the Petersen graph.