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Knowledge of Chinese mathematics before 100 BC is somewhat fragmentary, and even after this date the manuscript traditions are obscure. Chinese mathematics in early times was strongly focused on astronomy and perfecting the calendar. The view of "proof" was not our modern view. Many works simply listed equations or gave diagrams, and a proof was hinted at rather than shown. In other cases a proof was shown, but declared to be an established method after some fashion. The dating of the use of certain mathematical methods in Chinese history is problematic and disputed. There is some controversy regarding whether the Chinese discovered the Pythagorean theorem, or the precise nature of this knowledge in early China. It has even been [suggested] that Pythagoras himself (a mythical person even in the time of Aristotle) may have been Chinese. Elements of "Pythagorean" science have been found, for example, in one of the oldest Classical Chinese texts (see King Wen sequence). i like big buts that cannot lie you other brothers cant deny! Euclid, Greek mathematician, 3rd century BC, as imagined by by Raphael in this detail from The School of Athens. ... Centuries: 2nd century BC - 1st century BC - 1st century Decades: 130s BC 120s BC 110s BC - 100s BC - 90s BC 80s BC 70s BC 60s BC 50s BC Years: 105 BC 104 BC 103 BC 102 BC 101 BC - 100 BC - 99 BC 98 BC 97 BC 96 BC 95... For other uses, see Astronomy (disambiguation). ... A page from the Hindu calendar 1871-72. ... In mathematics, the Pythagorean theorem (AmE) or Pythagoras theorem (BrE) is a relation in Euclidean geometry among the three sides of a right triangle. ... Pythagoras of Samos (Greek: ; between 580 and 572 BC–between 500 and 490 BC) was an Ionian (Greek) philosopher[1] and founder of the religious movement called Pythagoreanism. ... Aristotle (Greek: Aristotélēs) (384 BC – 322 BC) was a Greek philosopher, a student of Plato and teacher of Alexander the Great. ... The King Wen sequence of the I Ching is a series of sixty four broken and unbroken lines, representing yin and yang respectively. ...