Mathematics in China emerged independently by the 11th century BC.The Chinese independently developed very large and negative numbers, decimals, a decimal system, a binary system, algebra, geometry, trigonometry.Many believe that Chinese mathematics and the mathematics of the ancient Mediterranean world had developed more or less independently up to the time when the The Nine Chapters on the Mathematical Art reached its final form, while the Writings on Reckoning and Huainanzi preceded it. It is often suggested that some Chinese mathematical discoveries predate their Western counterparts. One example is the Pythagorean theorem. There is some controversy regarding this issue and the precise nature of this knowledge in early China. The Chinese were one of the most advanced in dealing with mathematical computations, and created enormous numbers. Elements of "Pythagorean" science have been found, for example, in one of the oldest Classical Chinese texts. This book was known for all of the mathematical information it contained.