Let x and y be coprime positive integers. Prove gcd(x + y, x² + y²) E {1, 2}.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter6: More On Rings
Section6.1: Ideals And Quotient Rings
Problem 4E: Exercises
If and are two ideals of the ring , prove that is an ideal of .
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