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Mathematical center in Akademgorodok invites you to take part in the seminar on October 29 at 4 pm Novosibirsk time (UTC+7). 
The seminar's heads: A. E. Mironov, I. A. Taimanov, Huijun Fan, Eugene Zhang.

During the seminar, Ruan Yongbin (IAS, Zhejiang University, Hangzhou) will present his talk "Logarithmic GLSM and its applications".

In early 2010, a mathematical theory of GLSM was proposed by Fan-Jarvis-Ruan to generalize both Gromov-Witten theory and FJRW-theory. The mathematical GLSM theory produced an open moduli space, in contrast to the traditional moduli theory where the compactness is required. Then, a cosection (constructed out of superpotential) localized the theory to the critical locus. The above theory is theoretically beautiful, but not so useful in computation. Recently, a delicate compactification of GLSM (logarithmic GLSM) was constructed to remedy the above defect. Its localization formula is proved to be extremely effective to solve many outstanding problems in the subject of Gromov-Witten theory, including BCOV axioms of higher genus Gromov-Witten theory of quintic 3-fold, r-spin conjecture relating r-spin virtual cycle and locus of holomorphic differential, modularity of Gromov-Witten theory of elliptic fibration and so on. In the talk, we will survey the above developments.

These are joint works with Shuai Guo, Felix Janda and Qile Chen.

To take part, please, on October 29 after 3:45 pm Novosibirsk time (UTC+7) connect to the Zoom conference via this link: . 
You can also connect manually in the Zoom app using the Conference ID: 656 3835 4812 (password: 062453).

Please pay attention to the following rules of attending the online seminar:

• As a security measure, it is highly advisable to connect using your real name. 
• You are free to join the discussion after the end of the report. However, during the report please keep you microphone turned off. 
• For the convenience of the speaker, we recommend writing your questions in the chat in advance.