The sixth century, Pythagoras School scholars Hibbs in the study for a long diagonal length of the square when the discovery of the irrational,School was not Pythagoras recognized that its thrown into the sea and drown, resulting in the first crisis in the history of mathematics, that is, does not recognize the irrational and prevent its spread or this is almost the same; A.D. six centuries, the Pythagoras school of thought scholar hopes Burse in the research length is 1 square diagonal line length time had discovered the irrational number, was not acknowledged by the Pythagoras school of thought, throws it in the sea to be drown to death, creates in the history of mathematics the first crisis, namely did not acknowledge the irrational number and prevents its dissemination