#### ** Upcoming Talk**

**Jan. 13 (Wed.)**** 14:00-15:00**
You Hung Hsu (NCTS)

Venue: Lecture Hall 5F, Cosmology Building, NTU

Title: Exceptional Collections, t-structures and Categorical Action

**Abstract: In this talk, I will explain how to use categorical action of the shifted $q=0$ affine algebra to construct (or induce) t-structures on the weight categories. In particular, when the categories are the bounded derived category of coherent sheaves on Grassmannians or partial ag varieties, the t-structure we obtain is precisely the exotic t-structure which defined by R. Bezrukavnikov associated to the exceptional collections that given by M. Kapranov. As a by-product, we calculate some of the generators of the shifted $q=0$ affine algebra act on the basis given by the exceptional collections.
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