Yan Xu

collaborators

2 papers

math.CT2025

Extriangulated factorization systems, $s$ -torsion pairs and recollements

Yan Xu, Haicheng Zhang, Zhiwei Zhu

We introduce extriangulated factorization systems in extriangulated categories and show that there exists a bijection between $s$ -torsion pairs and extriangulated factorization sys…

math.CO2024

The smith normal form of the walk matrix of the Dynkin graph $A_{n}$

Liangwei Huang, Yan Xu, Haicheng Zhang

In this paper, we give the rank of the walk matrix of the Dynkin graph $A_{n}$ , and prove that its Smith normal form is $$\diag(\underbrace{1,\ldots,1}_{\lceil\frac{n}{2}\rceil},0,\l…

Extriangulated factorization systems, s-torsion pairs and recollements

The smith normal form of the walk matrix of the Dynkin graph An​

Extriangulated factorization systems, $s$ -torsion pairs and recollements

The smith normal form of the walk matrix of the Dynkin graph $A_{n}$