一、无理数的诞生及发展　　无理数起源于 2 50 0年以前 .相传在公元前 5世纪 ,在古希腊有一个以数学家毕达哥拉斯为首的数学学派 .这个学派认为整数是由上帝创造的 ,分数又是两个整数的比值 .因此 ,世界上除了整数和分数外 ,不可能再有什么其他的数 .可是后来有一位叫希伯斯的 1. The birth and development of irrational numbers The irrational numbers originated before 250 years. According to legend, in the 5th century BC, there was a mathematics school headed by the mathematician Pythagoras in ancient Greece. This school believed that the integers were created by God. Again, the score is a ratio of two integers. Therefore, there is no other number in the world except integers and scores. But later there was a man named Hibbs.