7 papers
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…
Near-bipartite bricks in which every b-invariant edge is a forcing edge
Yaxian Zhang, Fuliang Lu
A connected graph is matching covered if it has at least one edge and every edge lies in some perfect matching.Lovász proved that every matching covered graph G can be uniquely de…
Bricks in which every vertex is incident with a forcing edge
Xinyu Dai, Fuliang Lu, Yaxian Zhang
An edge of a matching covered graph G is a forcing edge if it lies in precisely one perfect matching of G. A matching covered graph is a brick if and only if it is 3-connected and…
Excluded conformal minors of Birkhoff-von Neumann graphs with equal global forcing number and maximum anti-forcing number
Yaxian Zhang, Yan Wu, Heping Zhang
Global forcing number and maximum anti-forcing number of matchable graphs (graphs with a perfect matching) were proposed in completely different situations with applications in the…
The maximum forcing numbers of quadriculated tori
Qianqian Liu, Yaxian Zhang, Heping Zhang
Klein and Randic (1985) proposed the concept of forcing number, which has an application in chemical resonance theory. Let be a graph with a perfect matching . The forcing n…
Cubic bricks that every b-invariant edge is forcing
Yaxian Zhang, Fuliang Lu, Heping Zhang
A connected graph G is matching covered if every edge lies in some perfect matching of G. Lovasz proved that every matching covered graph G can be uniquely decomposed into a list o…