Problem 5. 5.1. Let G and H by two groups, and let g = G and hЄ H be elements of finite order. Find the order of (g, h) in the group G × H, expressed in terms of |g| and h. 5.2. Let m,n Є Z, and let us write [a]m and [a] for the equivalence classes of a = Z in Z/mZ and Z/nZ, respectively. Show that ([1]m, [1] n) generates the group Z/mZxZ/nZ if and only if m and n are relatively prime.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.4: Cosets Of A Subgroup
Problem 32E: (See Exercise 31.) Suppose G is a group that is transitive on 1,2,...,n, and let ki be the subgroup...
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Problem 5.
5.1. Let G and H by two groups, and let g = G and hЄ H be elements of finite
order. Find the order of (g, h) in the group G × H, expressed in terms of |g|
and h.
5.2. Let m,n Є Z, and let us write [a]m and [a] for the equivalence classes of
a = Z in Z/mZ and Z/nZ, respectively. Show that ([1]m, [1] n) generates the
group Z/mZxZ/nZ if and only if m and n are relatively prime.
Transcribed Image Text:Problem 5. 5.1. Let G and H by two groups, and let g = G and hЄ H be elements of finite order. Find the order of (g, h) in the group G × H, expressed in terms of |g| and h. 5.2. Let m,n Є Z, and let us write [a]m and [a] for the equivalence classes of a = Z in Z/mZ and Z/nZ, respectively. Show that ([1]m, [1] n) generates the group Z/mZxZ/nZ if and only if m and n are relatively prime.
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