Exact-solution-count conjecture for singular Liouville equations on rectangular tori

Let EτE_\tau be a rectangular torus with τiR>0\tau\in i\mathbb{R}_{>0}, let nNn\in\mathbb{N}, and let ρ(8π(n1),8πn)\rho\in(8\pi(n-1),8\pi n). Consider

Δu+eu=ρδ0on Eτ.\Delta u+e^u=\rho\delta_0\quad\text{on }E_\tau.

Exact-solution-count conjecture. The equation possesses exactly nn solutions.

This refines the nonexistence results at the quantized values ρ=8πn\rho=8\pi n by predicting the precise number of solutions between consecutive multiples of 8π8\pi. The supplied text does not state a resolution of this conjecture.

Sources & referencesView supporting material

Primary source

Zhijie Chen and Chang-Shou Lin, “Sharp nonexistence results for curvature equations with four singular sources on rectangular tori”, arXiv:1709.04287 (2017).

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