In a Cofinite topology of X the collection of subsets a) r = {AcX|A ±Ø or A is finite} b) r = {Ac X| A =Ø or A is finite} c) r = {AcX|A=Ø and A° is finite} d) z = {Ac X| A=Ø or A° is finite}

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter1: Line And Angle Relationships
Section1.1: Early Definitions And Postulates
Problem 36E: Consider noncoplanar points A, B, C, and D. Using three points at a time such as A, B, and C, how...
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In a Cofinite topology of X the collection of subsets is:
a) z = {Ac X|A+Ø or A is finite}
b) t = {Ac X|A =Ø or A is finite}
c) r = {Ac X|A=Ø and 4° is finite}
d) 7 = {ACX|A=Ø or A° is finite}
Transcribed Image Text:In a Cofinite topology of X the collection of subsets is: a) z = {Ac X|A+Ø or A is finite} b) t = {Ac X|A =Ø or A is finite} c) r = {Ac X|A=Ø and 4° is finite} d) 7 = {ACX|A=Ø or A° is finite}
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