Takahashi's higher-genus BPS invariance conjecture for (P2,E)(\mathbb P^2,E)

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For every d∈Z>0d\in\mathbb Z_{>0} and every positive divisor kk of dd, let Ωd,kP2/E(ℏ)∈Q[ ⁣[ℏ] ⁣]\Omega_{d,k}^{\mathbb P^2/E}(\hbar)\in\mathbb Q[\![\hbar]\!] be the higher-genus relative BPS invariant defined from the relative invariants Ng,dP2/E,kN_{g,d}^{\mathbb P^2/E,k}. Let k′k' be another positive divisor of dd. Takahashi's higher-genus BPS conjecture. For every d∈Z>0d\in\mathbb Z_{>0} and every pair of positive divisors k,k′k,k' of dd, one has

Ωd,kP2/E(ℏ)=Ωd,k′P2/E(ℏ).\Omega_{d,k}^{\mathbb P^2/E}(\hbar)=\Omega_{d,k'}^{\mathbb P^2/E}(\hbar).

Equivalently, the higher-genus relative BPS invariant depends on dd but not on the divisor kk. The source states this as a reformulation of the preceding conjecture, and no resolution is supplied in the given text.

References

Primary source

Pierrick Bousseau, “A proof of N.Takahashi's conjecture for (P^2,E) and a refined sheaves/Gromov-Witten correspondence”, arXiv:1909.02992 (2025).

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