Let a and b be elements of a group. If |a| and |b| are relatively prime, show that intersects = {e}.
Let a and b be elements of a group. If |a| and |b| are relatively prime, show that intersects = {e}.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter3: Groups
Section3.2: Properties Of Group Elements
Problem 21E: Let a,b,c, and d be elements of a group G. Find an expression for (abcd)1 in terms of a1,b1,c1, and...
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Question
Let a and b be elements of a group. If |a| and |b| are relatively prime, show that <a> intersects <b> = {e}.
Expert Solution
Step 1
Let m and n be the order of the elements a and b of a group G. Given that the orders of a and b are relatively prime. Then,
gcd (m, n) = 1.
Step 2
By using the theorem
“Let a and b be integers. Suppose that gcd(a, b) =1. Then there exist integers x and y such that ax + by = 1”,
there exist integers x and y such that
mx + ny =1.
Step 3
Let g ∊ <a> Ո <b>. Then
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