A Let (A, +,.) be a subgroup of (M₂ (Z), +,.), Then A is ideal of M₂ (Z), where = {(ab) a, b, c € Z}.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.4: Cosets Of A Subgroup
Problem 10E: Let be a subgroup of a group with . Prove that if and only if .
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Let (A, +,.) be a subgroup of (M₂(Z), +,.), Then A is ideal of M₂ (Z), where
A =
{(a b) la, b, c € Z}.
От
O F
Transcribed Image Text:Let (A, +,.) be a subgroup of (M₂(Z), +,.), Then A is ideal of M₂ (Z), where A = {(a b) la, b, c € Z}. От O F
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