Jian of Qi Jian of Qi Jian, King of Qi (; reigned 264–221 BC) was the last king of Qi, one of the seven major states of the Warring States period of ancient China. His personal name was Tian Jian (田建), ancestral name Gui, and he did not have a posthumous title because he was the last king of Qi. Jian succeeded his father King Xiang of Qi, who died in 265 BC. He reigned for 44 years. At the time he acceded to the throne, there were only a few states left in what is now China. Qi was one of the
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