Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4595847 | Journal of Pure and Applied Algebra | 2016 | 11 Pages |
Abstract
Let R be a commutative Noetherian local ring of prime characteristic p and f:R⟶Rf:R⟶R the Frobenius ring homomorphism. For e≥1e≥1 let R(e)R(e) denote the ring R viewed as an R -module via fefe. Results of Peskine, Szpiro, and Herzog state that for finitely generated modules M, M has finite projective dimension if and only if ToriR(R(e),M)=0 for all i>0i>0 and all (equivalently, infinitely many) e≥1e≥1. We prove this statement holds for arbitrary modules using the theory of flat covers and minimal flat resolutions.
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Thomas Marley, Marcus Webb,