Cantong qi Cantong qi The Cantong qi is deemed to be the earliest book on alchemy in China. The title has been variously translated as "Kinship of the Three", "Akinness of the Three", "Triplex Unity", "The Seal of the Unity of the Three", and in several other ways. The full title of the text is Zhouyi cantong qi, which can be translated as, for example, "The Kinship of the Three, in Accordance with the Book of Changes". According to a well-established traditional view, the text was composed by Wei Boyang in the mid-second century CE, and deals entirely with alchemy—in particular, with
What Is Mathematics? Expectations" by Charles Dickens. According to Constance Reid, Courant finalized the title after a conversation with Thomas Mann. What Is Mathematics? What Is Mathematics? is a mathematics book written by Richard Courant and Herbert Robbins, published in England by Oxford University Press. It is an introduction to mathematics, intended both for the mathematics student and for the general public. First published in 1941, it discusses number theory, geometry, topology and calculus. A second edition was published in 1996 with an additional chapter on recent progress in mathematics, written by Ian Stewart. The book was based on Courant's course material. Although