"The Penguin Dictionary of Mathematics takes in all branches of pure and applied mathematics, from algebra to geometry and from mechanics to statistics. Invaluable for students at school and university level, it is also a useful and versatile book for economists, business people, engineers, technicians and scientists of all kinds, who use mathematics in the course of their work."--BOOK JACKET. From algebra to number theory, statistics to mechanics, this versatile and completely updated reference takes in all branches of pure and applied mathematics.