※ 현장 입장: 선착순 40명 ※ Zoom ID : 840 3364 0780 (https://snu-ac-kr.zoom.us/j/84033640780) Gromov-Witten invariants are some rational numbers counting curves inside a Calabi-Yau manifold. These numbers have some recurvsive structure on the genus of the curve. I will explain how to study this recursive structure through holomorphic anomaly equation. For a semi-simple Gromov-Witten theory, I will explain the method of proof of holomorphic anomaly equation for several examples using Givental-Teleman`s classification thoerem. After these,I will discuss how to generalize this method to a non-semi simple Gromov-Witten theory.