3 papers
math.CO2023
An axiomatization of matroids and oriented matroids as conditional independence models
Xiangying Chen
Matroids and semigraphoids are discrete structures abstracting and generalizing linear independence among vectors and conditional independence among random variables, respectively.…
math.AG2021
The leading coefficient of Lascoux polynomials
Alessio Borzí, Xiangying Chen, Harshit J. Motwani +2
Lascoux polynomials have been recently introduced to prove polynomiality of the maximum-likelihood degree of linear concentration models. We find the leading coefficient of the Las…
cs.DM2017
Digraph Polynomials for Counting Cycles and Paths
Xiangying Chen
Many polynomial invariants are defined on graphs for encoding the combinatorial information and researching them algebraically. In this paper, we introduce the cycle polynomial and…