3 papers
physics.comp-ph2026
A discrete duality finite volume method with harmonic average for semiconductor drift-diffusion equations
Shuya Liu, Zhicheng Liu, Bo Lin +4
The stationary drift-diffusion model is widely used to model charge transport in semiconductor devices. Classical methods, such as the finite volume Scharfetter--Gummel (FVSG) meth…
math.CO2025
Wheel-like bricks and minimal matching covered graphs
Xiaoling He, Fuliang Lu, Jinxin Xue
A connected graph G with at least two vertices is matching covered if each of its edges lies in a perfect matching. We say that an edge e in a matching covered graph G is removable…
math.CO2024
Planar wheel-like bricks
Fuliang Lu, Jinxin Xue
An edge e in a matching covered graph G is removable if G-e is matching covered; a pair {e; f} of edges of G is a removable doubleton if G-e-f is matching covered, but neither G-e…