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 2013 Schedule## {:r: scope="row"} Date|Speaker|Topic| ---:|:------|:---- {:r}8/28 | The Organizers | Organizational Meeting {:r}9/4 | The Higgs Branch | Freed {:r}9/11 | The Higgs Branch II | Distler {:r}9/18 | The Higgs Branch III | Distler {:r}9/25 | The Higgs Branch IV | Neitzke {:r}10/2 | The Higgs Branch V | Neitzke {:r}10/9 | --- | --- {:r}10/16| Mathieu Moonshine in $\mathcal{N}=2$ String Compactifications | Xi Dong {:r}10/23| Instantons and Higgs branches | Dey {:r}10/30| Instantons and Higgs branches II | Dey {:r}11/6 | DLCQ and (2,0) theory | Mainiero {:r}11/13| ??? | ??? {:r}11/20| ??? | ??? {:r}12/4 | ??? | ??? {: class="plaintable" style="text-align:center;" summary="Fall Schedule"} ###References### ####The 6D (2,0) Theory#### * E. Witten, [Geometric Langlands from Six Dimensions](http://arxiv.org/abs/0905.2720) * D. Freed and C. Teleman, [Relative Quantum Field Theory](http://arxiv.org/abs/arXiv:1212.1692) * Aharony, Berkooz, Kachru, Seiberg and Silverstein, [Matrix Description of Interacting Theories in Six Dimensions](http://arxiv.org/abs/hep-th/9707079) * Aharony, Berkooz and Seiberg, [Light-Cone Description of (2,0) Superconformal Theories in Six Dimensions](http://arxiv.org/abs/hep-th/9712117) ####Codimension-2 Defects#### * D. Gaiotto and E. Witten, [Supersymmetric Boundary Conditions in $\mathcal{N}=4$ Super Yang-Mills Theory](http://arxiv.org/abs/arXiv:0804.2902) ####Reduction to 5 dimensions (super Yang-Mills) #### * Y. Tachikawa, [On S-duality of 5d super Yang-Mills on $S^1$](http://arxiv.org/abs/arXiv:1110.0531) ####Reduction to 4 Dimensions ($\mathcal{N}=4$) #### * A. Sen, [Dyon-Monopole Bound States, Self-Dual Harmonic Forms on the Multi-Monopole Moduli Space, and SL(2,Z) Invariance in String Theory](http://arxiv.org/abs/hep-th/9402032) * C. Vafa, [Geometric Origin of Montonen-Olive Duality](http://arxiv.org/abs/hep-th/9707131) ####Reduction to 3 dimensions#### * Dimofte, Gaiotto, Gukov, [Gauge Theories Labelled by 3-Manifolds](http://arxiv.org/abs/1108.4389) * Cecotti, Cordova, Vafa, [Braids, Walls and Mirrors](http://arxiv.org/abs/1110.2115) ####4D $\mathcal{N}=2$ #### * D. Gaiotto, [$N=2$ Dualities](http://arxiv.org/abs/0904.2715) * Moore and Tachikawa, [On 2d TQFTs whose values are holomorphic symplectic varieties](http://arxiv.org/abs/1106.5698) * Gaiotto, Moore and Tachikawa, [On 6d N=(2,0) theory compactified on a Riemann surface with finite area](http://arxiv.org/abs/1110.2657) * Gaiotto, Neitzke, Tachikawa [Argyres-Seiberg duality and the Higgs branch](http://arxiv.org/abs/arXiv:0810.4541) * Argyres, Plesser, Seiberg [The Moduli Space of N=2 SUSY QCD and Duality in N=1 SUSY QCD] (http://arxiv.org/abs/hep-th/9603042) ####Structure of supersymmetric gauge theories#### * N. Nekrasov and V. Pestun, [Seiberg-Witten geometry of four dimensional N=2 quiver gauge theories](http://arxiv.org/abs/1211.2240) * Aharony, Seiberg and Tachikawa, [Reading between the lines of four-dimensional gauge theories](http://arxiv.org/abs/1305.0318) * Tachikawa [On the 6d origin of discrete additional data of 4d gauge theories](http://arxiv.org/abs/1309.0697) * Gaiotto, Seiberg and Tachikawa, [Comments on scaling limits of 4d N=2 theories](http://arxiv.org/abs/1011.4568) * Tachikawa, [A pseudo-mathematical pseudo-review on 4d N=2 supersymmetric QFTs](http://member.ipmu.jp/yuji.tachikawa/tmp/review-rebooted7.pdf)