Cantong qi Zhixu 陳致虛 (1290-ca. 1368) is entitled "Zhouyi cantong qi zhujie" 周易參同契注解 (Commentary and Explication of the "Cantong qi") and dates from ca. 1330. His text is ultimately based on Peng Xiao’s redaction, but contains about four dozen readings that are not documented in earlier extant works (Pregadio 2012:148-56). With the exception of Zhu Xi’s work, all extant commentaries to the "Cantong qi" written through the Yuan period (1279-1368) are related to the Taoist alchemical traditions. During the Ming (1368–1644) and the Qing (1644-1912) dynasties, the "Cantong qi" continued to exert its prestige on Neidan, but its influence also extended to
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