Let G be a group and let Z(G) be the centre of G. (i) What is an alternative way of saying Z(G) = G? (ii) Give an example of a group G such that |G| = 6 and Z(G) + {e}. Give an example of a group G such that |G| = 6 and Z(G) = {e}. (No proofs are required.) (iii) Does there exist a group G such that |G| > 2 but |Z(G)| = 2? Give an example, or %3D prove that such a group does not exist.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Let G be a group and let Z(G) be the centre of G.
(i)
What is an alternative way of saying Z(G) = G?
(ii) = 6 and Z(G) + {e}. Give an example of
Give an example of a group G such that G
a group G such that |G| = 6 and Z(G) = {e}. (No proofs are required.)
(i)
Does there exist a group G such that |G| > 2 but |Z(G)| = 2? Give an example, or
prove that such a group does not exist.
(iv) Does there exist a group G such that the index of Z(G) in G is 2? Give an example, or
prove that such a group does not exist.
Transcribed Image Text:Let G be a group and let Z(G) be the centre of G. (i) What is an alternative way of saying Z(G) = G? (ii) = 6 and Z(G) + {e}. Give an example of Give an example of a group G such that G a group G such that |G| = 6 and Z(G) = {e}. (No proofs are required.) (i) Does there exist a group G such that |G| > 2 but |Z(G)| = 2? Give an example, or prove that such a group does not exist. (iv) Does there exist a group G such that the index of Z(G) in G is 2? Give an example, or prove that such a group does not exist.
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