A quick and easy-to-understand encyclopedia of mathematical symbols. This is a useful reference for students of mathematics and physics who encounter unfamiliar symbols. A must-have book for science students, packed with fascinating topics that are enjoyable to read! An encyclopedia that is truly interesting and informative, no matter where you start reading. Where and when did + (plus) and - (minus) originate? / Did calculus originate from wine? / Was there a profession called "calculation master"? / What is the origin of "log"? / What is the real reason for the birth of the imaginary number i? / Leibniz's mistake? / Are the interior angles of a triangle not always 180°? / Where is the fourth dimension? / What is the meaning of a vector? / Can you make money on the lottery? / Is there a square circle? ...and more, full of trivia!