主講者:	張懷良 教授 (香港科技大學)
講題:	MSP fields and Gromov Witten invariants of Quintic Calabi Yau threefold
時間:	2015-01-15 (Thu.)  15:00 - 16:00
地點:	數學所 演講廳(6F) (台大院區)
Abstract:	Using "P fields" the Gromov-Witten invariants is reconstructed as a Landau Ginzburg type theory in algebraic geometry. Using ``spin fields" the Fan-Jarvis-Ruan-Witten invariant is also reconstructed in algebraic geometry. Recently in a joint work with Jun Li, Weiping Li and Melissa Liu, we study the moduli space of ``Mixed-Spin-P" fields (MSP). It shows how FJRW invariants determine GW invariants for quintic threefold for all genus. As a biproduct, it also suggests a possible approach to calculate g>0 GW invariant of quintic threefold.
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