# Topology Seminar 2013

This seminar is held on Tuesdays at 3pm in 210 Deady.

### Fall Quarter, 2012

- October 23 – Organizational meeting.
- October 30 – Dev Sinha (UO)

The geometry of Mumford classes in the cohomology of mapping class groups. - November 6 – Soren Galatius (Stanford University)

Homological stability for diffeomorphism groups. - November 13 – David Spivak (MIT)

Operads in computer programs and brains. - November 20 – Deb Vicinsky (UO)

The derivatives of the identity functor on DGL. - November 27 – No seminar.
- December 1-2 – Hosting the Cascade Topology Seminar
- December 4 – David Ayala (CalTech)

The Ran complex and Theta_n

### Winter Quarter, 2013

- January 15 – Bill Goldman (University of Maryland)

Complete affine 3-manifolds, Lorentzian and hyperbolic geometry - February 5 – Nathan Perlmutter (UO)

Cobordism categories of manifolds with singularities - February 12 – Organizational meeting to discuss paper reading series.
- February 19 – Dev Sinha (UO)

The Atiyah completion theorem - February 26 – Dan Dugger (UO)

The statement of the Segal Conjecture - March 5 – Hal Sadofsky (UO)

Lin’s theorem as a statement about Ext groups - March 12 – Ivan Horozov (Washington Univ. St. Louis)

Reciprocity laws on algebraic varieties via iterated integrals. - March 15 – Johannes Ebert

Characteristic classes for higher Torelli groups. - March 19 – Hal Sadofsky (UO)

The proof of the Ext version of Lin’s theorem.

### Spring Quarter, 2013

- April 9 – Dan Dugger (UO)

An introduction to equivariant (stable) homotopy theory.

Previous years: 2012 F11 S10 W10 F09 F08 S08 W08 F07S07 W07 F06 F05-S06 F04-S05 F03-S04 F02-S03 F00-S01 F99-S00 F98-S99 F97-S98