3. Let f: RS be a ring homomorphism (a) If I is an ideal of S, prove the pre-image of I, that is f-¹(I), is an ideal of R

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter6: More On Rings
Section6.3: The Characteristic Of A Ring
Problem 12E: 12. Let be a commutative ring with prime characteristic . Prove, for any in that for every...
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3. Let f: RS be a ring homomorphism
(a) If I is an ideal of S, prove the pre-image of I, that is f-¹(1), is an
ideal of R
(b) If P is a prime ideal of S, prove f-1(P) is a prime ideal of R
(c) If f is onto, prove that if J is any ideal of S, then J= f(I) where I
is an ideal of R containing kerf
Transcribed Image Text:3. Let f: RS be a ring homomorphism (a) If I is an ideal of S, prove the pre-image of I, that is f-¹(1), is an ideal of R (b) If P is a prime ideal of S, prove f-1(P) is a prime ideal of R (c) If f is onto, prove that if J is any ideal of S, then J= f(I) where I is an ideal of R containing kerf
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