1. Let I= {(x,y) | a, y € 2Z}. (a) Show that I is an ideal of Z × 2Z. (b) Use FIT for rings to show (Z x 2Z)/I = Z₂.

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 4E: Exercises If and are two ideals of the ring , prove that is an ideal of .
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1. Let
I= {(x,y) | a, y € 2Z}.
(a) Show that I is an ideal of Z × 2Z.
(b) Use FIT for rings to show (Z x 2Z)/I = Z₂.
Transcribed Image Text:1. Let I= {(x,y) | a, y € 2Z}. (a) Show that I is an ideal of Z × 2Z. (b) Use FIT for rings to show (Z x 2Z)/I = Z₂.
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