We showed previously that Zp) = {|a.beZ and płb} is a subring of Q. %3D (a) Find (Zp)", the group of units of Zip). (b) Prove that Zp) is a PID.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.5: Normal Subgroups
Problem 2E: 2. Show that is a normal subgroup of the multiplicative group of invertible matrices in .
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We showed previously that Zp) = {|a,be Z and ptb} is a subring of Q.
%3D
(a) Find (Zp)*, the group of units of Zp)-
(b) Prove that Zp is a PID.
Transcribed Image Text:We showed previously that Zp) = {|a,be Z and ptb} is a subring of Q. %3D (a) Find (Zp)*, the group of units of Zp)- (b) Prove that Zp is a PID.
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