28 Nov
2013
28 Nov
'13
10:09 p.m.
The smallest examples are the quaternion group Q8 and the dihedral group D_8 of order 8. See http://en.wikipedia.org/wiki/Quaternion_group. The center of Q8 is {1,-1} and the quotient has order 4 so must be abelian. On Thu, Nov 28, 2013 at 11:48 PM, Eugene Salamin <gene_salamin@yahoo.com>wrote:
Is the following a theorem?
Let G be a group with center Z. If G/Z is abelian, then G is abelian.
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