This third edition of a bestselling encyclopedia contains over 1,000 pages of definitions, formulas, illustrations, web links, and facts from mathematics, the sciences, and engineering. This edition is extensively updated throughout with many new important entries added. Every entry includes a definition, followed by a formula, an illustration where applicable, and bibliographic information. A condensed version of the three-volume encyclopedia, this clear and concise book is accessible to anyone who has some background in high school mathematics.