Changchang Xi

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math.RT2023

Self-injective algebras under derived equivalences

Changchang Xi, Jin Zhang

The Nakayama permutations of two derived equivalent, self-injective Artin algebras are conjugate. A different but elementary approach is given to showing that the weak symmetry and…

math.RT2020

Structure of centralizer algebras

Changchang Xi, Jinbi Zhang

Given an $n \times n$ matrix $c$ over a unitary ring $R$ , the centralizer of $c$ in the full $n \times n$ matrix ring $M_{n} (R)$ is called a principal centralizer matrix ring, denoted…