A closed-form virtual count of maps from a fixed genus-g curve to a degree-ℓ hypersurface in a Grassmannian, with Schubert incidence conditions, expressed via the Vafa-Intriligator formula, plus a large-degree enumerativity theorem.
Pseudo-holomorphic curves with a fixed complex structure in positive symplectic manifolds
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abstract
We prove a symplectic version of a conjecture of Lian and Pandharipande: in sufficiently high degree, the fixed-domain Gromov-Witten invariants of positive symplectic manifolds are signed counts of pseudo-holomorphic curves. The original conjecture in the complex algebraic setting was recently disproved by Beheshti et al. However, we show that the statement holds when the complex structure is replaced by a generic almost complex structure. The proof relies on showing that the fixed-domain Gromov-Witten pseudocycle can be constructed without the use of inhomogeneous or domain-dependent perturbations, which answers positively a question posed by Ruan and Tian.
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A short way of counting maps to hypersurfaces in Grassmannians
A closed-form virtual count of maps from a fixed genus-g curve to a degree-ℓ hypersurface in a Grassmannian, with Schubert incidence conditions, expressed via the Vafa-Intriligator formula, plus a large-degree enumerativity theorem.