On the Cohen-Macaulay modules of graded subrings

Author:
Douglas Hanes

Journal:
Trans. Amer. Math. Soc. **357** (2005), 735-756

MSC (2000):
Primary 13C14

Published electronically:
April 27, 2004

MathSciNet review:
2095629

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Abstract: We give several characterizations for the linearity property for a maximal Cohen-Macaulay module over a local or graded ring, as well as proofs of existence in some new cases. In particular, we prove that the existence of such modules is preserved when taking Segre products, as well as when passing to Veronese subrings in low dimensions. The former result even yields new results on the existence of finitely generated maximal Cohen-Macaulay modules over non-Cohen-Macaulay rings.

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Additional Information

**Douglas Hanes**

Affiliation:
School of Mathematics, University of Minnesota, Minneapolis, Minnesota 55455

Address at time of publication:
Neuro-otology Research, Legacy Research Center, 1225 NE 2nd Avenue, Portland, Oregon 97232

Email:
hanes@math.umn.edu, douglash@neurotology.org

DOI:
http://dx.doi.org/10.1090/S0002-9947-04-03562-7

Received by editor(s):
November 11, 2001

Received by editor(s) in revised form:
August 14, 2003

Published electronically:
April 27, 2004

Article copyright:
© Copyright 2004
American Mathematical Society