Relative stable pairs/Gromov–Witten descendent correspondence

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Let XX be a nonsingular projective 33-fold, let D⊂XD\subset X be a nonsingular divisor, and let γ1,…,γℓ∈H∗(X,Q)\gamma_1,\ldots,\gamma_\ell\in H^*(X,\mathbb{Q}) restrict to zero on DD. Let μ\mu be a relative partition, and let τα1−1(γ1)⋯ταℓ−1(γℓ)‾\overline{\tau_{\alpha_1-1}(\gamma_1)\cdots\tau_{\alpha_\ell-1}(\gamma_\ell)} be the transformed descendent insertion defined from the correspondence matrix for the logarithmic tangent bundle TX[−D]T_X[-D]. Set −q=eiu-q=e^{iu}.

Relative descendent GW/Pairs correspondence.

(−q)−dβ/2ZP(X/D;q ∣τα1−1(γ1)⋯ταℓ−1(γℓ) ∣μ)β=(−iu)dβ+ℓ(μ)−∣μ∣ZGW′(X/D;u ∣τα1−1(γ1)⋯ταℓ−1(γℓ)‾ ∣μ)β.(-q)^{-d_\beta/2}\mathsf Z_{\mathsf P}\Big(X/D;q\ \Big|\tau_{\alpha_1-1}(\gamma_1)\cdots\tau_{\alpha_\ell-1}(\gamma_\ell)\ \Big|\mu\Big)_\beta = (-iu)^{d_\beta+\ell(\mu)-|\mu|}\mathsf Z'_{\mathsf{GW}}\Big(X/D;u\ \Big|\overline{\tau_{\alpha_1-1}(\gamma_1)\cdots\tau_{\alpha_\ell-1}(\gamma_\ell)}\ \Big|\mu\Big)_\beta.

The conjecture is restricted to insertions vanishing on the relative divisor because the transformed descendent correspondence is subtle for arbitrary classes. The source states that the stable-pairs descendent series is also conjectured to be rational in qq.

References

Primary source

R. Pandharipande and A. Pixton, “Gromov-Witten/Pairs descendent correspondence for toric 3-folds”, arXiv:1203.0468 (2012).

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