Simple group
Simple group: A nontrivial group that has only two normal subgroups: the whole group and the trivial subgroup.
Related terms: Almost simple group, quasisimple group, characteristically simple group, simple algebraic group
Term variations: Groupprops:Category:Variations of simplicity
Primary subject wiki entry: Groupprops:Simple group
Also located at: Wikipedia:Simple group, Mathworld:SimpleGroup, Springer Online Reference Works