Author

Xiao-Lei Zhang

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Preprint Sep 2026

On the n-perfectness under split nilpotent extensions

Let $\pi:S\twoheadrightarrow R$ be a split ring epimorphism with nilpotent kernel $J$, and let $R\hookrightarrow S$ be a fixed ring-theoretic section. We prove a change-of-rings formula which is considerably stronger than an equality of global invariants: if $X$ is a left $S$-module satisfying $\Tor_i^S(R,X)=0$ for eve...

W. Qi, Xiao-Lei Zhang · 0 citations

Preprint Sep 2026

On the iso-Artinianness of one-dimensional Noetherian rings

Let $R$ be a one-dimensional commutative Noetherian ring with a unique minimal prime $\mathfrak p$ such that $D=R/\mathfrak p$ is a principal ideal domain. We give a complete characterization of the iso-Artinian property in this class, that is, the following conditions are equivalent: $R$ is iso-Artinian; $\mathfrak pR...

Xiao-Lei Zhang, R.-F. Yan, W. Qi · 0 citations