## Department of Mathematics, Duke University

**Upcoming Seminars:**
- Tuesday, June 4, 2019, 10:00am, 119 Physics, Department of Mathematics Seminar

*Asymptotic Analysis and Rare Event Simulation for Failure Probabilities in Discrete Random Media*

Jeffrey LaComb
- Monday, June 10, 2019, 3:30pm, 119 Physics, Number Theory Seminar

*On the growth of torsion in the cohomology of arithmetic groups*

Dan Yasaki
- Bergeron and Venkatesh give a precise conjecture about the growth of the order of the torsion subgroup of homology groups over a tower of cocompact congruence subgroups. In this talk, we describe our computational investigation of this phenomena. We consider the cohomology of several (non-cocompact) arithmetic groups, including GL_n(Z) for n = 3, 4, 5 and GL_2(O) for various rings of integers, and observe its growth as a function of level. In all cases where our dataset is sufficiently large, we observe excellent agreement with the same limit as in the predictions of Bergeron-Venkatesh. This is joint work with Avner Ash, Paul Gunnells, and Mark McConnell.

- Monday, July 8, 2019, 1:00pm, 227 Physics, Thesis Defense

*Accelerating the Computation of Density Functional Theory's Correlation Energy under Random Phase Approximations*

Kyle Thicke
- Monday, July 15, 2019, 9:00am, 119 Physics, Thesis Defense

*Extensions of Immersed Interface Method to Open Interfaces and Hemodynamic Models*

Sarah Ritchey Patterson
- Friday, August 30, 2019, 3:15pm, 119 Physics, Algebraic Geometry Seminar

*TBA*

Luca Schaffler (U Mass)
- TBA

- Wednesday, September 18, 2019, 12:00pm, Physics 119, Applied Math And Analysis Seminar

*TBA*

Zoran Grujic (University of Virginia)
- TBA

- Friday, September 27, 2019, 3:15pm, 119 Physics, Algebraic Geometry Seminar

*TBA*

Chenglong Yu (U Penn)
- TBA

- Wednesday, October 23, 2019, 12:00pm, Physics 119, Applied Math And Analysis Seminar

*TBA*

Boris Khesin (U of Toronto)
- TBA

- Monday, November 18, 2019, 3:15pm, 119 Physics, Geometry/topology Seminar

*TBD*

Aleksander Doan (Columbia/Cambridge)
- TBA

This calendar is available on the Web at
http://www.math.duke.edu/cgi-bin/mcal.
To subscribe to the email list, please
email calendar@math.duke.edu.

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