as showing the power and value of the characteristic-theory, that the theorem “every group whose order contains only two distinct primes is soluble,” appears as a corollary.

THE theory of groups of finite order is one to which in very recent times the attention of mathematicians has again and again been directed. Until a little time ago any one who wished to become ...

This book is an introduction to group theory and its application to physics. The author considers the physical applications and develops mathematical theory in a presentation that is unusually ...