Abstract
In this paper, we study holomorphic discs in K3 surfaces and defined the open Gromov–Witten invariants. Using this new invariant, we can establish a version of correspondence between tropical discs and holomorphic discs with non-trivial invariants. We give an example of wall-crossing phenomenon of the invariant and expect it satisfies Kontsevich–Soibelman wall-crossing formula.
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