Functional relations under symplectic exchange for topological-recursion differentials

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Let C\mathcal{C} be a compact Riemann surface. Let xx and ww be meromorphic functions on C\mathcal{C} such that dx\mathrm{d}x and dw\mathrm{d}w have no common zeroes, and let B\mathcal{B} be a fundamental bidifferential of the second kind. Denote by ωg,n\omega_{g,n} the differentials obtained by topological recursion from (C,x,w,B)(\mathcal{C},x,w,\mathcal{B}), and by ωg,n∨\omega_{g,n}^{\vee} those obtained from (C,w,x,B)(\mathcal{C},w,x,\mathcal{B}). Define

ω~0,2=ω~0,2∨=B.\widetilde{\omega}_{0,2}=\widetilde{\omega}_{0,2}^{\vee}=\mathcal{B}.

Functional-relations conjecture. For every 2g−2+n≥02g-2+n\geq 0, these differentials satisfy the functional relations of Theorem~, after those relations are expressed as relations between meromorphic differentials on C\mathcal{C}. This is a proposed general relation between topological recursion and the symplectic exchange x↦wx\mapsto w. The supplied material does not provide a resolution status or explain the precise functional relations beyond the cited theorem.

References

Primary source

Gaëtan Borot, Séverin Charbonnier, Elba Garcia-Failde, Felix Leid and Sergey Shadrin, “Functional relations for higher-order free cumulants”, arXiv:2112.12184 (2023).

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