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 7E: Exercises
Let be an ideal of a ring , and let be a subring of . Prove that is an ideal of
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Question
Let R be a ring with unity 1R and let S be a subring of R containing 1R. If r∈R is a unit of R and r∈S, then r is a unit of S.
true or false?
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