The Blue Dog Coalition was formed.
Mathematics in China emerged independently by the 11th century BC .. The Chinese independently developed very large and negative numbers , decimals , a place value decimal system , a binary system , algebra , geometry , and trigonometry .. decimal. decimal. binary system. Binary numeral system. algebra. algebra. geometry. geometry. trigonometry. trigonometry. Knowledge of Chinese mathematics before 254 BC is somewhat fragmentary , and even after this date the manuscript traditions are obscure .. mathematics. mathematics. As in other early societies the focus was on astronomy in order to perfect the agricultural calendar , and other practical tasks , and not on establishing formal systems .. astronomy. astronomy. calendar. calendar. formal systems. formal systems. Ancient Chinese mathematicians did not develop an axiomatic approach , but made advances in algorithm development and algebra .. algebra. algebra. While the Greek mathematics declined in the west during the mediaeval times , the achievement of Chinese algebra reached its zenith in the 13th century , when Zhu Shijie invented the method of four unknowns .. algebra. algebra. mathematics. mathematics. Zhu Shijie. Zhu Shijie. As a result of obvious linguistic and geographic barriers , as well as content , Chinese mathematics and the mathematics of the ancient Mediterranean world are presumed to have developed more or less independently up to the time when The Nine Chapters on the Mathematical Art reached its final form , while the Writings on Reckoning and Huainanzi are roughly contemporary with classical Greek mathematics .. mathematics. mathematics. The Nine Chapters on the Mathematical Art. The Nine Chapters on the Mathematical Art. Writings on Reckoning. Writings on Reckoning. Huainanzi. Huainanzi. Some exchange of ideas across Asia through known cultural exchanges from at least Roman times is likely .. Frequently , elements of the mathematics of early societies correspond to rudimentary results found later in branches of modern mathematics such as geometry or number theory .. geometry. geometry. mathematics. mathematics. number theory. number theory. The Pythagorean theorem for example , has been attested to the time of the Duke of Zhou .. Pythagorean theorem. Pythagorean theorem#History. has been attested. Zhoubi Suanjing. Duke of Zhou. Duke of Zhou. Knowledge of Pascal 's triangle has also been shown to have existed in China centuries before Pascal , such as by Shen Kuo .. Pascal. Blaise Pascal. Shen Kuo. Shen Kuo