English

Note on the Krull dimension of rings of integer-valued polynomials

Commutative Algebra 2025-11-10 v1

Abstract

Let DD be an integral domain with quotient field K,K, EE a subset of KK and XX an indeterminate over KK. The set Int(E,D):={fK[X];  f(E)D}\mathrm{Int}(E,D):=\{f\in K[X];\; f(E)\subseteq D\}, of integer-valued polynomials on EE over DD, is known to be an integral domain. The purpose of this note is to calculate the Krull dimension of Int(E,D)\mathrm{Int}(E,D) across various classes of integral domains DD and specific subsets EE of DD. We further extend our study to the ring IntB(E,D):={fB[X];  f(E)D},\mathrm{Int}_B(E,D):=\{f\in B[X];\; f(E)\subseteq D\}, where BB is an integral domain containing DD

Keywords

Cite

@article{arxiv.2510.03443,
  title  = {Note on the Krull dimension of rings of integer-valued polynomials},
  author = {M. M. Chems-Eddin and B. Feryouch and A. Tamoussit},
  journal= {arXiv preprint arXiv:2510.03443},
  year   = {2025}
}

Comments

13 pages