English

On the Set of $t$-Linked Overrings of an integral domain

Commutative Algebra 2007-11-15 v2

Abstract

et RR be an integral domain with quotient field LL. An overring TT of RR is tt-linked over RR if I1=RI^{-1}=R implies that (T:IT)=T(T:IT)=T for each finitely generated ideal II of RR. Let Ot(R)O_{t}(R) denotes the set of all tt-linked overrings of RR and O(R)O(R) the set of all overrings of RR. The purpose of this paper is to study some finiteness conditions on the set Ot(R)O_{t}(R). Particularly, we prove that if Ot(R)O_{t}(R) is finite, then so is O(R)O(R) and Ot(R)=O(R)O_{t}(R)=O(R), and if each chain of tt-linked overrings of RR is finite, then each chain of overrings of RR is finite. This yields that the tt-linked approach is more efficient than the Gilmer's treatment in \cite{G1}. We also examine the finiteness conditions in some Noetherian-like settings such as Mori domain, quasicoherent Mori domain, Krull domain etc. We establish a connection between Ot(R)O_{t}(R) and the set of all strongly divisorial ideals of RR and we conclude by a characterization of domains RR that are tt-linked under all their overrings.

Keywords

Cite

@article{arxiv.math/0611556,
  title  = {On the Set of $t$-Linked Overrings of an integral domain},
  author = {Abdeslam Mimouni},
  journal= {arXiv preprint arXiv:math/0611556},
  year   = {2007}
}

Comments

14 pages