Mirror-series and Calabi–Yau quantum-cohomology conjecture from recursive descent

Let L~mN,k,d\widetilde L_m^{N,k,d} denote the result of formally iterating the recursive functions for fixed kk while descending NN to N=kN=k, and let L~mk,k\widetilde L_m^{k,k} be the associated generating function. Let ada_d and bdb_d be the coefficients of the hypergeometric series used in the mirror calculation, and let Lik,k(et)L_i^{k,k}(e^t) denote the quantum-cohomology structure constants after the mirror-coordinate change.

Calabi–Yau mirror-recursion conjecture. Formal iteration of the laws of Conjecture 2 down to N=kN=k should give

kdkad=L~0k,k,d,k^{dk}a_d=\widetilde L_0^{k,k,d}, kdkbd=1dL~1k,k,d+m=1d11mL~1k,k,mL~0k,k,dm,k^{dk}b_d=\frac{1}{d}\widetilde L_1^{k,k,d}+\sum_{m=1}^{d-1}\frac{1}{m}\widetilde L_1^{k,k,m}\widetilde L_0^{k,k,d-m},

and should give the structure constants of the quantum cohomology ring of the degree-kk Calabi–Yau hypersurface through

Lik,k(et)=L~ik,k(ex(t))L~1k,k(ex(t)).L_i^{k,k}(e^t)=\frac{\widetilde L_i^{k,k}(e^{x(t)})}{\widetilde L_1^{k,k}(e^{x(t)})}.

This conjecture connects formal recursive descent with the hypergeometric series and the quantum cohomology of Calabi–Yau hypersurfaces. It is presented as a consequence expected from the preceding recursive conjectures, with no resolution stated.

Sources & referencesView supporting material

Primary source

A. Collino and M. Jinzenji, “On the Structure of the Small Quantum Cohomology Rings of Projective Hypersurfaces”, arXiv:hep-th/9611053 (1999).

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