All talks held **4-5pm** in **384-I** (new seminar room) unless otherwise noted.

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** Tuesday, January 20,
2015:** Elizabeth
Gasparim (Universidad Catolica del Norte, Chile),
Symplectic Lefschetz fibrations from a
Lie theoretical viewpoint.

** Tuesday, February 4, 2015 (unusual time and room!):** Lino Grama (Uni
Campinas, Brazil),
Fukaya-Seidel categories associated to Lefschetz
fibrations on adjoint orbits. Held in 384-H

** Tuesday, February 10, 2015:** Matthew Day (U. Arkansas), On the second homology group of the Torelli subgroup of Aut(*F*_{n})

** Tuesday, February 17, 2015:** Gabriel C. Drummond-Cole (IBS
Center for Geometry and Physics,
Korea), Chain level string topology.

** Thursday, February 26, 2015:** Dan Freed (UT Austin), Twisted
matrix factorizations and loop groups. At 1pm in 384-I (UNUSUAL
DAY and TIME)

** Tuesday, March 3, 2015:** Constantin Teleman (UC Berkeley),
K_G(\Omega
G) and the affine Toda system.

** Tuesday, March 10, 2015:** Dan Ramras
(IUPUI), Stabilized character varieties
for surfaces and the Chern-Simons line bundle.

**Tuesday April 21, 2015:** Joey Hirsh (MIT), Model structures for coalgebras.

**Tuesday May 4th, 2015:** Daniel Pomerleano (Imperial College),
The non-commutative Hodge theory of
quotient stacks

**Tuesday May 11th, 2015:** possible Geometry seminar TBA

**Tuesday May 19th,
2015:** Nathan
Dunfield (UIUC), A tale of two norms.

**Tuesday May 26th,
2015:** Dave
Witte Morris
(Lethbridge), Arithmetic
subgroups whose representations all map into GL_{n}(**Z**).