%0 Journal Article
%T On the Hartshorne--Speiser--Lyubeznik Theorem about Artinian modules with a Frobenius action
%A Rodney Y. Sharp
%J Mathematics
%D 2006
%I arXiv
%X Let $R$ be a commutative Noetherian local ring of prime characteristic. The purpose of this paper is to provide a short proof of G. Lyubeznik's extension of a result of R. Hartshorne and R. Speiser about a module over the skew polynomial ring $R[x,f]$ (associated to $R$ and the Frobenius homomorphism $f$, in the indeterminate $x$) that is both $x$-torsion and Artinian over $R$.
%U http://arxiv.org/abs/math/0605330v1