Jack-polynomial interpolation conjecture for real and complex origamis

Let b:=α1b:=\alpha-1, and define

R(t,p;b):=log(nλnJλ(b)tn)=nλnrλ(b)pλtn.\mathcal{R}(t,\mathbf{p};b):=\log\left(\sum_n\sum_{\lambda\vdash n}J^{(b)}_\lambda t^n\right)=\sum_n\sum_{\lambda\vdash n}r_\lambda(b)p_\lambda t^n.

For μ=[μ1,,μk]\mu=[\mu_1,\ldots,\mu_k], let Rμ(t,p;0)\mathcal{R}_\mu(t,\mathbf{p};0) be the generating function for connected complex origamis in H(μ11,,μk1)\mathcal{H}(\mu_1-1,\ldots,\mu_k-1), and let Rμ(t,p;1)\mathcal{R}_\mu(t,\mathbf{p};1) be the generating function for connected real origamis in H(μ11,μ11,,μk1,μk1)\mathcal{H}(\mu_1-1,\mu_1-1,\ldots,\mu_k-1,\mu_k-1).

Jack-polynomial interpolation conjecture. The generating series Rμ(t,p;b)\mathcal{R}_\mu(t,\mathbf{p};b) interpolates between the quasimodular forms given by the generating functions for connected complex origamis in H(μ11,,μk1)\mathcal{H}(\mu_1-1,\ldots,\mu_k-1) and the quantum modular forms given by the generating functions for connected real origamis in H(μ11,μ11,,μk1,μk1)\mathcal{H}(\mu_1-1,\mu_1-1,\ldots,\mu_k-1,\mu_k-1).

At b=0b=0 and b=1b=1, the series specializes respectively to the complex- and real-origami generating functions; the complex specialization is known to be quasimodular, while the real specialization is quantum modular if the first conjecture holds. The interpolation claim is presented as an open question.

Sources & referencesView supporting material

Primary source

Raphaël Fesler and Peter Zograf, “Origami: real structure, enumeration and quantum modularity”, arXiv:2502.06548 (2025).

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