simple group

Noun

 * 1)  A  which has no normal subgroups apart from the  and itself.
 * 2) * 1989,, Simple Groups of Lie Type, John Wiley & Sons, Wiley Classics Edition, page 1,
 * Since the first edition of this book was published in 1972, great progress has been made in the theory of finite simple groups. Above all, the classification of the finite simple groups was finally completed in 1981.In addition, the five Mathieu groups have been supplemented by the discovery between 1965 and 1981 of 21 further 'sporadic' simple groups.

Translations

 * Italian: gruppo semplice
 * Polish: grupa prosta