Large-genus asymptotics of mixed Weil–Petersson intersection numbers

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Let Vg,n;dV_{g,n;d} denote the mixed intersection number associated with a fixed set d=(d1,…,dn)d=(d_1,\dots,d_n) of non-negative integers, and let Vg,nV_{g,n} denote the corresponding Weil–Petersson volume. For each k≥1k\geq 1, let lkl_k be the number of indices ii such that di=kd_i=k. Mixed-intersection asymptotics conjecture. For any fixed n>0n>0 and fixed set d=(d1,…,dn)d=(d_1,\dots,d_n) of non-negative integers,

lim⁡g→∞Vg,n;dVg,n=∏k≥1(π2k2k(2k+1)!!)lk.\lim_{g\rightarrow\infty}\frac{V_{g,n;d}}{V_{g,n}}=\prod_{k\geq 1}\left(\frac{\pi^{2k}}{2^k(2k+1)!!}\right)^{l_k}.

This predicts a universal limiting ratio for mixed intersection numbers as the genus tends to infinity with the marked-point data fixed. The source reports numerical computations for bounded genus and small values of the multiplicities, but gives no resolution of the conjecture.

References

Primary source

Peter Zograf, “On the large genus asymptotics of Weil-Petersson volumes”, arXiv:0812.0544 (2020).

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