Beifang Chen

collaborators

3 papers

math.CO2026

Partition-selected flow polynomials and associated arrangements

Beifang Chen, Ying Cao, Houshan Fu +1

We introduce a partition-selection method to generalize the flow, chromatic, and Tutte polynomials of a graph by restricting the standard edge subgraph expansions to subgraphs give…

math.CO2026

Ehrhart quasi-polynomials of rational polytopes by real dilations

Ying Cao, Beifang Chen

This paper is to study the Ehrhart function $L (P, t)$ of a rational $n$ -polytope $P$ , defined as the number of lattice points of dilated polytopes $tP$ with real numbers $t \geq 0$ .…

math.CO2025

On the foundations of signed graphs I: chain groups, frame matroid, and bivariate flow polynomial

Beifang Chen

This paper studies signed graphs with possible outer-edges. We introduce and investigate the chain group, the boundary operator, the co-boundary operator, the flow group, the tensi…