[geometry-ml:06044] Re: CREST seminars

[Yasuyuki Kawahigashi]

皆様，
次回12月20日の CREST オンラインセミナーは以下のようになります． Zoom 
リンクご希望の方は下記ページで登録をお願いします．(リンクは毎回同じですので登録済みの方は 
再登録は不要です．)
https://www.ms.u-tokyo.ac.jp/~yasuyuki/crest-seminar.htm
いつもより開始時間が30分遅くなっていますのでご注意ください．
河東泰之
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Speaker: Mayuko Yamashita (Kyoto University)
Title: Topological elliptic genera
Date/Time: 16:30-18:00, Friday, December 20, 2024
Abstract: There is a classical construction of elliptic genera for 
SU-manifolds, which assigns Jacobi forms to SU-manifolds, and physically 
related to non-chiral 2d N=(2, 2) sigma models. In this talk, I explain my 
work with Ying-Hsuan Lin (arXiv:2412.02298) to give homotopy-theoretical 
refinements to it, which we call "topological elliptic genera". The 
codomain becomes the spectrum (in homotopy theoretical sense) called 
"Topological Jacobi Forms". I explain the construction and physical idea 
behind, and discuss a mathematical application where we derive an 
interesting divisibility result of Euler numbers.