This is the homepage for the UT Geometry and String Theory Seminar. At the organizational meeting we will flesh out the details of our plans for the semester. Below are some suggestions to get us started. ##Fall 2017 Schedule## {:r: scope="row"} Date|Speaker|Topic| ---:|:------|:----| {:r}8/30 | |Organizational Meeting| {:r}9/6 | |Introduction + [Komargodski video](http://scgp.stonybrook.edu/video_portal/video.php?id=3271) (pt 1)| {:r}9/13 | |[Komargodski video](http://scgp.stonybrook.edu/video_portal/video.php?id=3271) (pt 2) | {:r}9/20 |Ivan Tulli | anomalies, part 1 | {:r}9/27 |Sebastian Schulz | anomalies, part 2 | {:r}10/4 |Sebastian Schulz | anomalies, part 4 | {:r}10/11|Arun Debray | anomalies in discrete symmetries | {:r}10/18|Arun Debray | anomalies in discrete symmetries, 2 | {:r}10/25|Fei Yan | Generalized Global Symmetries, Part I| {:r}11/1 |Philip Argyres | | {:r}11/8|Fei & Ravi | Generalized Global Symmetries, Part II | {:r}11/15|Ravi Mohan | Generalized Global Symmetries, Part III | {:r}11/29|Clay Cordova| | {:r}12/6 | Ali Shehper |Comments on global symmetries, anomalies and dualities in (2+1) dimensions | {: class="plaintable" style="text-align:center;" summary="Fall Schedule"} $\,$ ##Spring 2018 Schedule## {:r: scope="row"} Date|Speaker|Topic| ---:|:------|:----| {:r}1/17 | |Organizational Meeting and Discussion| {:r}1/24 | Val Zakharevich| Comments on global symmetries, anomalies, and duality | {:r}1/31 | Dan Freed| On gauging finite subgroups | {:r}2/7 | Andy Neitzke| Theta, time reversal, and temperature I | {:r}2/14 | Fei Yan | Theta, time reversal, and temperature II | {:r}2/21| Arun Debray | 2-groups | {:r}2/28 | Mario Marone | Time-reversal breaking in $\mathrm{QCD}_4$ I| {:r}3/7| Jacques Distler | Time-reversal breaking in $\mathrm{QCD}_4$ II | {:r}3/21| Chris Beem | TBA | {:r}3/28 | | | {:r}4/4| | | {:r}4/11| | | {:r}4/18| | | {:r}4/25 | | | {:r}5/2 | | | {: class="plaintable" style="text-align:center;" summary="Spring Schedule"} $\,$ ##References## #### (Higher) Symmetries, Anomaly-Matching and Phases of QCD * A. Kapustin, R. Thorngren, "[Anomalies of discrete symmetries in various dimensions and group cohomology](https://arxiv.org/abs/1404.3230)" * D. Gaiotto, A. Kapustin, N. Seiberg and B. Willett, "[Generalized Global Symmetries](https://arxiv.org/abs/1412.5148)" * F. Benini, P. Hsin and N. Seiberg, "[Comments on global symmetries, anomalies, and duality in (2+1)d](https://arxiv.org/abs/1702.07035)" * D. Gaiotto, A. Kapustin, Z. Komargodski and N. Seiberg, "[Theta, Time Reversal, and Temperature](https://arxiv.org/abs/1703.00501)" * Z. Komargodski and N. Seiberg, "[A Symmetry Breaking Scenario for $\text{QCD}_3$](https://arxiv.org/abs/1706.08755)" * D. S. Freed, Z. Komargodski, N. Seiberg, "[The Sum Over Topological Sectors and θ in the 2+1-Dimensional CPâ¿ σ-Model](https://arxiv.org/abs/1707.05448)" * D. Gaiotto, Z. Komargodski and N. Seiberg, "[Time-Reversal Breaking in $\text{QCD}_4$, Walls, and Dualities in 2+1 Dimensions](https://arxiv.org/abs/1708.06806)" * J. Gomis, Z. Komargodski, N. Seiberg, "[Phases of adjoint $\text{QCD}_3$ and dualities](https://arxiv.org/abs/1710.03258)" * C. Cordova, P.-S. Hsin, N. Seiberg, "[Time-reversal symmetry, anomalies, and dualities in (2+1)d](https://arxiv.org/abs/1712.08639)" * Y. Tachikawa, "[On gauging finite subgroups](https://arxiv.org/abs/1712.09542)" * D. M. Hofman, N. Iqbal, "[Generalized global symmetries and holography](https://arxiv.org/abs/1707.08577)" ####Mathematics Papers on 2-Groups * G. C. Baez, A. D. Lauda, "[Higher-dimensional algebra V: 2-groups](https://arxiv.org/abs/math/0307200)" * C. J. Schommer-Pries, "[Central extension of smooth 2-groups and a finite-dimensional string 2-group](https://arxiv.org/abs/0911.2483)"