Some applications of the ultrafilter topology on spaces of valuation domains, Part II

Carmelo Antonio Finocchiaro; Marco Fontana

Displaying similar documents to “Some applications of the ultrafilter topology on spaces of valuation domains, Part II”

Some applications of the ultrafilter topology on spaces of valuation domains, Part I

Carmelo Antonio Finocchiaro, Marco Fontana (2010)

Actes des rencontres du CIRM

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In the present note we introduce the basic definitions and the main results concerning the spaces of valuation domains needed in the subsequent Part II.

Star operations in extensions of integral domains

David F. Anderson, Said El Baghdadi, Muhammad Zafrullah (2010)

Actes des rencontres du CIRM

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An extension $D \subseteq R$ of integral domains is $t$ - (resp., $t$ -) if ${(I R)}^{- 1} = {(I^{- 1} R)}_{v}$ (resp., ${(I R)}_{v} = {(I_{v} R)}_{v})$ for every nonzero finitely generated fractional ideal $I$ of $D$ . We show that strongly $t$ -compatible implies $t$ -compatible and give examples to show that the converse does not hold. We also indicate situations where strong $t$ -compatibility and its variants show up naturally. In addition, we study integral domains $D$ such that $D \subseteq R$ is strongly $t$ -compatible (resp., $t$ -compatible) for every overring $R$ of $D$ . ...

The quasi Isbell topology on function spaces

D. N. Georgiou, A. C. Megaritis (2015)

Colloquium Mathematicae

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In this paper, on the family (Y) of all open subsets of a space Y we define the so called quasi Scott topology, denoted by $τ_{q S c}$ . This topology defines in a standard way, on the set C(Y,Z) of all continuous maps of the space Y to a space Z, a topology $t_{q I s}$ called the quasi Isbell topology. The latter topology is always larger than or equal to the Isbell topology, and smaller than or equal to the strong Isbell topology. Results and problems concerning the topology $t_{q I s}$ are given.

On hit-and-miss hyperspace topologies

Gerald Beer, Robert K. Tamaki (1993)

Commentationes Mathematicae Universitatis Carolinae

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The Vietoris topology and Fell topologies on the closed subsets of a Hausdorff uniform space are prototypes for hit-and-miss hyperspace topologies, having as a subbase all closed sets that hit a variable open set, plus all closed sets that miss (= fail to intersect) a variable closed set belonging to a prescribed family $Δ$ of closed sets. In the case of the Fell topology, where $Δ$ consists of the compact sets, a closed set $A$ misses a member $B$ of $Δ$ if and only if $A$ is far from $B$ in a uniform...

The order topology for a von Neumann algebra

Emmanuel Chetcuti, Jan Hamhalter, Hans Weber (2015)

Studia Mathematica

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The order topology $τ_{o} (P)$ (resp. the sequential order topology $τ_{o s} (P)$ ) on a poset P is the topology that has as its closed sets those that contain the order limits of all their order convergent nets (resp. sequences). For a von Neumann algebra M we consider the following three posets: the self-adjoint part $M_{s a}$ , the self-adjoint part of the unit ball $M ¹_{s a}$ , and the projection lattice P(M). We study the order topology (and the corresponding sequential variant) on these posets, compare the order topology...

Function space topologies deriving from hypertopologies and networks

A. Di Concilio, A. Miranda (2001)

Bollettino dell'Unione Matematica Italiana

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In un progetto di generalizzazione delle classiche topologie di tipo «set-open» di Arens-Dugundji introduciamo un metodo generale per produrre topologie in spazi di funzioni mediante l'uso di ipertopologie. Siano $X$ , $Y$ spazi topologici e $C (X, Y)$ l'insieme delle funzioni continue da $X$ verso $Y$ . Fissato un «network» $α$ nel dominio $X$ ed una topologia $τ$ nell'iperspazio $C L (Y)$ del codominio $Y$ si genera una topologia $τ_{α}$ in $C (X, Y)$ richiedendo che una rete $\{f_{λ}\}$ di $C (X, Y)$ converge in $τ_{α}$ ad $f \in C (X, Y)$ se e solo se la rete $\{\bar{f_{λ} (A)}\}$ converge...