1\Show that for any collection of topologies on X there exist a unique smallest toplogy larger than each member of the collection. 2\Let X be a non empty set and F be a family of subsets of X such that F1:0, X E F F2: F1, F2 E F then F1 UF₂ EF F3:F, EF for any λEA then n {F2: λ EA} EF Show that there exists a unique topology for X such that T-closed of subsets of X are precisely the member of F. M) جات

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.7: Relations
Problem 13E: 13. Consider the set of all nonempty subsets of . Determine whether the given relation on is...
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1\Show that for any collection of topologies on X there exist a unique smallest toplogy
larger than each member of the collection.
2\Let X be a non empty set and F be a family of subsets of X such that
F1:0, X E F
F2: F1, F2 E F then F1 UF₂ EF
F3:F, EF for any λEA then n {F2: λ EA} EF
Show that there exists a unique topology for X such that T-closed of subsets of X are
precisely the member of F.
M)
جات
Transcribed Image Text:1\Show that for any collection of topologies on X there exist a unique smallest toplogy larger than each member of the collection. 2\Let X be a non empty set and F be a family of subsets of X such that F1:0, X E F F2: F1, F2 E F then F1 UF₂ EF F3:F, EF for any λEA then n {F2: λ EA} EF Show that there exists a unique topology for X such that T-closed of subsets of X are precisely the member of F. M) جات
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