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Jun 9, 2015 at 17:46 comment added Marty Isaacs What is meant by a "nontrivial extension"? Presumably this excludes direct products, but how about semidirect products? The regular wreath product of an abelian group by G is an extension that has a nontrivial representation of degree 1.
Jun 8, 2015 at 14:35 review First posts
Jun 8, 2015 at 15:02
Jun 8, 2015 at 14:31 history asked Jeong Seon CC BY-SA 3.0