Prove that if A1 and A2 are compact sets then A1 U A2 is compact.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter6: More On Rings
Section6.2: Ring Homomorphisms
Problem 2E: 2. Prove that is commutative if and only if is commutative.
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