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Topology Seminar

The Topology Seminar will meet on Fridays, usually alternating with the AGC seminar, 3:00 p.m. – 4:00 p.m. in room MB 124 (Mathematics Building). Below you find the information for the topology talks. Everybody who is interested is invited to join. Please contact Jens Harlander ( for more information.

You can also view selected Topology Seminar Archives.

Fall 2018

Date: September 7 2018
Speaker: Jens Harlander
Title: Some conjectures in 2-dimensional combinatorial topology

Abstract: In the early part of the 20th century a variety of homotopy notions emerged, such as simple homotopy, combinatorial in nature, or the homotopy theory of chain complexes, algebraic and part of homological algebra. It is well understood how the different notions relate to each other, and what obstructions exist for direct comparisons. However, fundamental open problems remain, particularly in dimension 2, where questions concerning group presentations enter the discussion. I will talk about three conjectures in dimension 2.

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