Theorem 3.16. Suppose X is a set and S is a collection of subsets of X. Then S is a subbasis for some topology on X if and only if every point of X is in some element of S.
Theorem 3.16. Suppose X is a set and S is a collection of subsets of X. Then S is a subbasis for some topology on X if and only if every point of X is in some element of S.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter3: Groups
Section3.1: Definition Of A Group
Problem 42E: 42. For an arbitrary set , the power set was defined in Section by , and addition in was...
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Could you explain how to show 3.16 in detail? Thank you! In particular, I am having hard time proving (<-) part.
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