Quasi-homeomorphisms, Goldspectral spaces and Jacspectral spaces

Othman Echi

Bollettino dell'Unione Matematica Italiana (2003)

  • Volume: 6-B, Issue: 2, page 489-507
  • ISSN: 0392-4041

Abstract

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In this paper, we deal with the study of quasi-homeomorphisms, the Goldman prime spectrum and the Jacobson prime spectrum of a commutative ring. We prove that, if g : Y X is a quasi-homeomorphism, Z a sober space and f : Y Z a continuous map, then there exists a unique continuous map F : X Z such that F g = f . Let X be a T 0 -space, q : X s X the injection of X onto its sobrification X s . It is shown, here, that q Gold X = Gold X s , where Gold X is the set of all locally closed points of X . Some applications are also indicated. The Jacobson prime spectrum of a commutative ring R is the set of all prime ideals of R which are intersections of some maximal ideals of R . One of our main results is a surprising answer to the problem of ordered disjoint union of jacspectral sets (ordered sets which are isomorphic to the Jacobson prime spectrum of some ring): Let { ( X λ , λ ) : λ Λ } be a collection of ordered disjoint sets and X = λ Λ X λ . Partially order X by declaring x y to mean that there exists λ Λ such that x , y X λ and x λ y . Then the following statements are equivalent: (i) ( X , ) is jacspectral. (ii) ( X λ , λ ) is jacspectral, for each λ Λ .

How to cite

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Echi, Othman. "Quasi-homeomorphisms, Goldspectral spaces and Jacspectral spaces." Bollettino dell'Unione Matematica Italiana 6-B.2 (2003): 489-507. <http://eudml.org/doc/196084>.

@article{Echi2003,
abstract = {In this paper, we deal with the study of quasi-homeomorphisms, the Goldman prime spectrum and the Jacobson prime spectrum of a commutative ring. We prove that, if $g \colon Y \to X$ is a quasi-homeomorphism, $Z$ a sober space and $f \colon Y \to Z$ a continuous map, then there exists a unique continuous map $F \colon X \to Z$ such that $F \circ g =f$. Let $X$ be a $T_\{0\}$-space, $q \colon X \to^\{s\} X$ the injection of $X$ onto its sobrification $^\{s\}X$. It is shown, here, that $q(\text\{Gold\}(X))=\text\{Gold\}(\sideset\{^\{s\}\}\{\}\{\operatorname\{X\}\})$, where $\text\{Gold\}(X)$ is the set of all locally closed points of $X$. Some applications are also indicated. The Jacobson prime spectrum of a commutative ring $R$ is the set of all prime ideals of $R$ which are intersections of some maximal ideals of $R$. One of our main results is a surprising answer to the problem of ordered disjoint union of jacspectral sets (ordered sets which are isomorphic to the Jacobson prime spectrum of some ring): Let $\\{(X_\{\lambda\}, \leq_\{\lambda\}) \, : \, \lambda\in\Lambda \\}$ be a collection of ordered disjoint sets and $X=\bigcup_\{\lambda\in\Lambda\} X_\{\lambda\}$. Partially order $X$ by declaring $x\leq y$ to mean that there exists $\lambda\in\Lambda$ such that $x$, $y\in X_\{\lambda\}$ and $x\leq_\{\lambda\} y$. Then the following statements are equivalent: (i) $(X, \leq)$ is jacspectral. (ii) $(X_\{\lambda\}, \leq_\{\lambda\})$ is jacspectral, for each $\lambda\in\Lambda$.},
author = {Echi, Othman},
journal = {Bollettino dell'Unione Matematica Italiana},
language = {eng},
month = {6},
number = {2},
pages = {489-507},
publisher = {Unione Matematica Italiana},
title = {Quasi-homeomorphisms, Goldspectral spaces and Jacspectral spaces},
url = {http://eudml.org/doc/196084},
volume = {6-B},
year = {2003},
}

TY - JOUR
AU - Echi, Othman
TI - Quasi-homeomorphisms, Goldspectral spaces and Jacspectral spaces
JO - Bollettino dell'Unione Matematica Italiana
DA - 2003/6//
PB - Unione Matematica Italiana
VL - 6-B
IS - 2
SP - 489
EP - 507
AB - In this paper, we deal with the study of quasi-homeomorphisms, the Goldman prime spectrum and the Jacobson prime spectrum of a commutative ring. We prove that, if $g \colon Y \to X$ is a quasi-homeomorphism, $Z$ a sober space and $f \colon Y \to Z$ a continuous map, then there exists a unique continuous map $F \colon X \to Z$ such that $F \circ g =f$. Let $X$ be a $T_{0}$-space, $q \colon X \to^{s} X$ the injection of $X$ onto its sobrification $^{s}X$. It is shown, here, that $q(\text{Gold}(X))=\text{Gold}(\sideset{^{s}}{}{\operatorname{X}})$, where $\text{Gold}(X)$ is the set of all locally closed points of $X$. Some applications are also indicated. The Jacobson prime spectrum of a commutative ring $R$ is the set of all prime ideals of $R$ which are intersections of some maximal ideals of $R$. One of our main results is a surprising answer to the problem of ordered disjoint union of jacspectral sets (ordered sets which are isomorphic to the Jacobson prime spectrum of some ring): Let $\{(X_{\lambda}, \leq_{\lambda}) \, : \, \lambda\in\Lambda \}$ be a collection of ordered disjoint sets and $X=\bigcup_{\lambda\in\Lambda} X_{\lambda}$. Partially order $X$ by declaring $x\leq y$ to mean that there exists $\lambda\in\Lambda$ such that $x$, $y\in X_{\lambda}$ and $x\leq_{\lambda} y$. Then the following statements are equivalent: (i) $(X, \leq)$ is jacspectral. (ii) $(X_{\lambda}, \leq_{\lambda})$ is jacspectral, for each $\lambda\in\Lambda$.
LA - eng
UR - http://eudml.org/doc/196084
ER -

References

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