8. Let S be the set of all 2 x 2 matrices of the form where x is an integer. Assume that S is a ring with respect to matrix addition and multiplication. (a) Is S a commutative ring? (b) Does S have a unity? (c) Does S have zero divisors?
8. Let S be the set of all 2 x 2 matrices of the form where x is an integer. Assume that S is a ring with respect to matrix addition and multiplication. (a) Is S a commutative ring? (b) Does S have a unity? (c) Does S have zero divisors?
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 28E: 28. a. Show that the set is a ring with respect to matrix addition and multiplication.
b. Is...
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