let x be a set and {TiliEI} be a collection of topologies on x. show that the intersection n Ti is a topology on x but the union U Ti ¿EI LEI is not a topology on x.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.7: Distinguishable Permutations And Combinations
Problem 22E
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let x be a set and {TiliEI} be a collection
of
topologies on x. show that the intersection
n Ti is a topology on x but the Union U Ti
LEI
¿EI
is not a topology on x.
Transcribed Image Text:let x be a set and {TiliEI} be a collection of topologies on x. show that the intersection n Ti is a topology on x but the Union U Ti LEI ¿EI is not a topology on x.
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