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# Jer-Chin Chuang : Subdivisions and Transgressive Chains

Combinatorial transgressions are secondary invariants of a space admitting triangulations. They arise from subdivisions and are analogous to transgressive forms such as those in Chern-Weil theory. In this talk, I characterize transgressions that are path-independent of subdivision sequence. The result is obtained by using a cohomology on posets that is shown to be equivalent to higher derived functors of the inverse (or projective) limit over the opposite poset.

**Category**: Geometry and Topology**Duration**: 01:34:37**Date**: September 16, 2008 at 4:25 PM-
**Tags:**seminar, Geometry/topology Seminar

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