Gromov-Witten invariants of Calabi-Yau manifolds with two Kähler parameters

Abstract: We study the Gromov-Witten theory of $K_{\mathsf{P}^1\times\mathsf{P}^1}$ and some Calabi-Yau hypersurface in toric variety. We give a direct geometric proof of the holomorphic anomaly euqation for $K_{\mathsf{P}^1\times\mathsf{P}^1}$ in the form predicted by B-model physics. We also calculate the closed formula of genus one quasimap invariants of Calabi-Yau hypersurface in $\mathsf{P}^{m-1}\times\mathsf{P}^{n-1}$ after restricting second K\"ahler parameter to zero. By wall-crossing theorem between Gromov-Witten and quasimap invariants, we can obtain the genus one Gromov-Witten invariants.