๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Prefibers and the cartesian product of metric spaces

โœ Scribed by Claude Tardif


Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
501 KB
Volume
109
Category
Article
ISSN
0012-365X

No coin nor oath required. For personal study only.

โœฆ Synopsis


The properties of certain sets called prefibers in a metric space are used to show that the algebraic properties of the Cartesian product of graphs generalize to metric spaces.

Definition 1.1. (i) Let X = lJEIXi, for i E I, pri denotes the projection on Xi; for x E X, the i-fiber of X through x is the set

X(i, X) = {y E 5 Xi: prj(Y) = prj(X)

for all i E l{i}}.


๐Ÿ“œ SIMILAR VOLUMES


Cartesian Products of Graphs and Metric
โœ S. Avgustinovich; D. Fon-Der-Flaass ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 68 KB

We prove uniqueness of decomposition of a finite metric space into a product of metric spaces for a wide class of product operations. In particular, this gives the positive answer to the long-standing question of S. Ulam: 'If U ร— U V ร— V with U , V compact metric spaces, will then U and V be isometr

The Cartesian product of hypergraphs
โœ Lydia Ostermeier; Marc Hellmuth; Peter F. Stadler ๐Ÿ“‚ Article ๐Ÿ“… 2011 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 236 KB

## Abstract We show that every simple, (weakly) connected, possibly directed and infinite, hypergraph has a unique prime factor decomposition with respect to the (weak) Cartesian product, even if it has infinitely many factors. This generalizes previous results for graphs and undirected hypergraphs

Metric spaces and the axiom of choice
โœ Omar De la Cruz; Eric Hall; Paul Howard; Kyriakos Keremedis; Jean E. Rubin ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 173 KB ๐Ÿ‘ 1 views

## Abstract We study conditions for a topological space to be metrizable, properties of metrizable spaces, and the role the axiom of choice plays in these matters.