PETER MARK ROGET （1779--1869） was a British lexicographer and physician. Roger's Thesaurus, a standard reference work for over a century, represents his highly personal view of how the English language reflects the structure of the universe. In some ways, that view is dated today; but the complex structure and breadth of the thesaurus still prove surprisingly helpful to the modern user. Probably the most comprehensive thesaurus on the market. For virtually any word search, it is guaranteed that you can find the most appropriate word with the utmost assurance because of its succinct definition.
With over 4,000 entries, this informative A to Z provides clear, jargon-free definitions on a wide variety of mathematical terms. Its entries cover both pure and applied mathematics, and include key theories, concepts, methods, programmes, people, and terminology. For this sixth edition, around 800 new terms have been defined, expanding on the dictionary's coverage of topics such as algebra, differential geometry, algebraic geometry, representation theory, and statistics. Among this new material are articles such as cardinal arithmetic, first fundamental form, Lagrange's theorem, Navier-Stokes equations, potential, and splitting field. The existing entries have also been revised and updated to account for developments in the field. Numerous supplementary features complement the text, including detailed appendices on basic algebra, areas and volumes, trigonometric formulae, and Roman numerals. Newly added to these sections is a historical time
