3 papers
nlin.SI2026
Hankel Determinants from Quadratic Orthogonal Pairs for Hyperelliptic Functions and Their Applications
Xiang-Ke Chang, Jiyuan Liu
As argued by Hone in the paper [Commun. Pure Appl. Math., 74(11):2310--2347, 2021], a ``mismatch" problem remained unsolved while he was investigating continued fraction expansions…
math.AP2025
Infinite-peakon solutions of the Camassa-Holm equation
Xiang-Ke Chang, Jonathan Eckhardt, Aleksey Kostenko
We study a class of (conservative) low regularity solutions to the Camassa-Holm equation on the line by exploiting the classical moment problem (in the framework of generalized ind…
nlin.SI2025
On Isospectral flows related to (dual) cubic strings: Novikov, DP peakons and B, C-Toda lattices
Xiang-Ke Chang
The Degasperis--Procesi (DP) equation can be viewed as an isospectral deformation of the boundary value problem for the so-called cubic string, while the Novikov equation can be fo…