The generalized Witten conjecture for geometric descendent potentials

Let C=(Σ,x,y)\mathcal C=(\Sigma,x,y) be a spectral curve with mm boundaries. Let D(t;)\mathcal D({\bf t};\hbar) be its geometric total descendent potential, and for g(Σ)1\mathfrak g(\Sigma)\geq1 let Dμ,νNP(t;;w)\mathcal D^{\rm NP}_{\mu,\nu}({\bf t};\hbar;w) be the non-perturbative total descendent potential. Let t=t(p){\bf t}={\bf t}({\bf p}) be a coordinate transformation and let QΔ(p,p)Q_\Delta({\bf p},{\bf p}) be a quadratic function. Generalization of the Witten conjecture. There exist t=t(p){\bf t}={\bf t}({\bf p}) and QΔ(p,p)Q_\Delta({\bf p},{\bf p}) such that, for g=0\mathfrak g=0, eQΔ(p,p)/2D(t(p);)e^{Q_\Delta({\bf p},{\bf p})/2}\mathcal D(\hbar\cdot{\bf t}({\bf p});\hbar) is a tau-function of the mm-component KP hierarchy with KP times {pki/k}k1,1im\{p_k^i/k\}_{k\geq1,\,1\leq i\leq m}, while for g1\mathfrak g\geq1, eQΔ(p,p)/2Dμ,νNP(t(p);;w)e^{Q_\Delta({\bf p},{\bf p})/2}\mathcal D^{\rm NP}_{\mu,\nu}(\hbar\cdot{\bf t}({\bf p});\hbar;w) is such a tau-function; both satisfy certain reduction structures. This combines the topological-recursion integrability claim with the TR–geometry correspondence. The paper presents it as a conjectural generalization; the full statement remains open.

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Primary source

Shuai Guo, Ce Ji and Qingsheng Zhang, “A generalization of the Witten conjecture through spectral curve”, arXiv:2309.12271 (2025).

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