Exercise 5. Prove that given positive integers a and b, there is a positive integer d such that • d divides a and d divides b, and • if c is a positive integer which divides both a and b then c divides d (in other words, any common divisor of a and b must divide d).

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.4: Binary Operations
Problem 9E: 9. The definition of an even integer was stated in Section 1.2. Prove or disprove that the set of...
icon
Related questions
Question
Exercise 5. Prove that given positive integers a and b, there is a positive integer d such that
• d divides a and d divides b, and
• if c is a positive integer which divides both a and b then c divides d (in other words, any
common divisor of a and b must divide d).
HINT: Start this proof by defining a set D
{ax + by | x, y E Z and a set C = D N Z,o. What
Transcribed Image Text:Exercise 5. Prove that given positive integers a and b, there is a positive integer d such that • d divides a and d divides b, and • if c is a positive integer which divides both a and b then c divides d (in other words, any common divisor of a and b must divide d). HINT: Start this proof by defining a set D {ax + by | x, y E Z and a set C = D N Z,o. What
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer