Jiangang Qi

collaborators

2 papers

math.CA2020

The number of Dirac-weighted eigenvalues of Sturm-Liouville equations with integrable potentials and an application to inverse problems

Xiao Chen, Jiangang Qi

In this paper, we further Meirong Zhang, et al.'s work by computing the number of weighted eigenvalues for Sturm-Liouville equations, equipped with general integrable potentials an…

math.DS2019

KAM theorem for reversible mapping of low smoothness with application

Jing Li, Jiangang Qi, Xiaoping Yuan

Assume the mapping $A : {x_{1} = x + ω + y + f (x, y), y_{1} = y + g (x, y), (x, y) \in T^{d} \times B (r_{0})$ is reversible with respect to $G…