Let m be a positive integer. If m is not a prime, prove that the set {1,2,..., m – 1} is not a group under modulo-m multiplication.
Let m be a positive integer. If m is not a prime, prove that the set {1,2,..., m – 1} is not a group under modulo-m multiplication.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.6: Congruence Classes
Problem 18E
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