activity
20102026
most citedBounding the diameter and eigenvalues of amply regular graphs via Lin-Lu-Yau curvature

6 citations · 22 across the 16 of their papers we have counts for

collaborators

17 papers

math.AP2026

Flow decomposition and stochastic completeness of weighted graphs

Qingsong Gu, Lu Hao, Xueping Huang +1

We give a new proof by flow decomposition of the known Grigor'yan type integral criterion for stochastic completeness of weighted graphs. The main ingredient is a finite-domain est…

math.AP2026

Flow Decomposition and Sharp Integral Fujita Criteria on Weighted Graphs

Qingsong Gu, Lu Hao, Xueping Huang +1

We study the Fujita phenomenon for semilinear heat inequalities generated by variable-speed Laplacians on infinite weighted graphs. Assuming that the graph carries a proper adapted…

math.AP2026

A sharp integral criterion for the Lane--Emden system of inequalities on weighted graphs

Qingsong Gu, Lu Hao, Xueping Huang +1

We establish a sharp integral nonexistence criterion for the Lane--Emden system of inequalities \[ -Δu\ge v^p,\qquad -Δv\ge u^q, \qquad p,q>0,\quad pq>1, \] on arbitrary infinite,…

math.DG2026

Nonnegative Bakry--Émery Curvature on Bounded-Degree Graphs Implies Volume Doubling and Poincaré Inequalities

Qi Guo, Xueping Huang, Yi C. Huang

We prove that every connected simple graph of bounded degree satisfying the classical dimension-free Bakry--Émery condition for the unnormalised Laplacian i…

math.AP2026

A Volume-Growth Criterion for the p-Laplace Inequality on Weighted Graphs

Qingsong Gu, Lu Hao, Xueping Huang +1

We prove a nonexistence result for nonnegative solutions of the quasi-linear elliptic inequality \[ -Δ_p u\ge σ(x)u^q \] on infinite locally finite connected weighted graphs, where…

math.AP2026

On Brezis Open Problem 3.1

Qi Guo, Xueping Huang, Yi C. Huang +2

Let be the unit disk in . We consider the harmonic map equation subject to the Dirichlet boundary condition $ u(e^{iθ})=(R\cosθ,R\sinθ,…