Abstract
We compute the genus zero family Gromov–Witten invariants for K3 surfaces using the topological recursion formula and the symplectic sum formula for a degeneration of elliptic K3 surfaces. In particular we verify the Yau–Zaslow formula for non-primitive classes of index two.
Citation
Junho Lee. Naichung Conan Leung. "Yau–Zaslow formula on K3 surfaces for non-primitive classes." Geom. Topol. 9 (4) 1977 - 2012, 2005. https://doi.org/10.2140/gt.2005.9.1977
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