Mathematics, Department of

 

Department of Mathematics: Dissertations, Theses, and Student Research

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First Advisor

Srikanth B. Iyengar

Second Advisor

Roger Wiegand

Date of this Version

8-2015

Document Type

Dissertation

Comments

A dissertation Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Doctor of Philosophy, Major: Mathematics, Under the Supervision of Srikanth B. Iyengar and Roger Wiegand. Lincoln, Nebraska: August, 2015

Copyright (c) 2015 Katharine Shultis

Abstract

Let R be a commutative, Noetherian, local ring and M a finitely generated R-module. Consider the module of homomorphisms HomR(R/a,M/bM) where b [subset of] a are parameter ideals of M. When M = R and R is Cohen-Macaulay, Rees showed that this module of homomorphisms is isomorphic to R/a, and in particular, a free module over R/a of rank one. In this work, we study the structure of such modules of homomorphisms for a not necessarily Cohen-Macaulay R-module M.

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