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Seminar of Algebraic Geometry in East Asia
 
10:15 - 11:15, December 4, 2020 (Friday)
broadcast in Room 515, Cosmology Bldg., NTU, Online seminar
(線上演講 於台大次震宇宙館515教室直播/收播)
Stokes Matrices, Surfaces, and Points on Spheres
Yu-Wei Fan (Yau Mathematical Sciences Center, Tsinghua University)

Abstract:

Moduli spaces of points on n-spheres carry natural actions of braid groups. For n=0,1, and 3, we prove that these symmetries extend to actions of mapping class groups of positive genus surfaces, through exceptional isomorphisms with certain moduli of local systems. This relies on the existence of group structure for spheres in these dimensions. We also apply the exceptional isomorphisms to the study of Stokes matrices and exceptional collections of triangulated categories. Joint work with Junho Peter Whang. 

Join the seminar online, through Zoom.

會議 ID:947 8793 7855

密碼:323472



 

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