Department of

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for events the day of Thursday, November 8, 2018.

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Thursday, November 8, 2018

12:00 pm in Altgeld Hall 102,Thursday, November 8, 2018

2FA Open Hour

Math IT   [email] (Illinois Math)

Abstract: If you have any questions regarding the mandatory 2FA enrollment, require a 2FA token, or need help setting up the Duo Mobile app, please stop by our office, 102 Altgeld Hall, from noon to 1pm. If none of our early-November open hours work for you, please contact us at math-it@illinois.edu.

12:30 pm in 464 Loomis,Thursday, November 8, 2018

Holomorphic SCFTs of small index

Theo Johnson-Freyd (Perimeter)

Abstract: Stolz and Teichner have conjectured that the moduli space of D=1+1, N=(0,1) QFTs provides a geometric model for Topological Modular Forms. Some important building blocks in this moduli space are the holomorphic superconformal field theories, and the conjecture leads to predictions about the possible values the supersymmetric index of such SCFTs can take. Specifically, the conjecture leads one to predict the existence of SCFTs of small nonzero index, and that the minimal possible index depends in an interesting way on the central charge of the SCFT. I will explain a construction of some SCFTs of indexes equal to the predicted minimal values. The construction leads to a new divisibility result in the seemingly unrelated field of algebraic coding theory. Based on joint work with Davide Gaiotto and Noam D Elkies.