Clavis mathematicae

"Clavis Mathematicae," which translates to "The Key to Mathematics," is a work written by the mathematician and philosopher John Wallis in the 17th century. First published in 1657, it serves as a comprehensive exposition of mathematical concepts and forms a significant part of the history of mathematics. In this text, Wallis aimed to provide a systematic approach to mathematics, including various branches such as arithmetic, geometry, algebra, and calculus.