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On the reducing projective dimension over local rings

Published online by Cambridge University Press:  31 October 2023

Olgur Celikbas
Affiliation:
School of Mathematical and Data Sciences, West Virginia University, Morgantown, WV, USA
Souvik Dey
Affiliation:
Department of Mathematics, University of Kansas, Lawrence, KS, USA Faculty of Mathematics and Physics, Department of Algebra, Charles University, Sokolovská 83, 186 75 Praha, Czech Republic
Toshinori Kobayashi
Affiliation:
School of Science and Technology, Meiji University, Kawasaki-shi, Kanagawa, Japan
Hiroki Matsui*
Affiliation:
Department of Mathematical Sciences, Faculty of Science and Technology, Tokushima University, Tokushima, Japan
*
Corresponding author: Hiroki Matsui; Email: hmatsui@tokushima-u.ac.jp

Abstract

In this paper, we are concerned with certain invariants of modules, called reducing invariants, which have been recently introduced and studied by Araya–Celikbas and Araya–Takahashi. We raise the question whether the residue field of each commutative Noetherian local ring has finite reducing projective dimension and obtain an affirmative answer for the question for a large class of local rings. Furthermore, we construct new examples of modules of infinite projective dimension that have finite reducing projective dimension and study several fundamental properties of reducing dimensions, especially properties under local homomorphisms of local rings.

Information

Type
Research Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of Glasgow Mathematical Journal Trust

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