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十六世纪,正当欧州数学家对负数的解释陷于困境时,又一个新数卷进了争议的漩涡,它就是虚数。十二世纪印度数学家拜斯伽罗可算是第一位与虚数照面的人。他曾经说过:“正数负数的平方恒为正数;正数的平方根有二,一正一负;负数无平方根,因其非平方之数”。遗憾的是,在刚要看见虚数的时候拜斯伽罗让它溜走了。让虚数溜走的,也不只拜斯伽罗一人。在意大利数学家卡尔丹(1501—1576)之前几
In the sixteenth century, when the interpretation of negative numbers by European mathematicians was in trouble, another new number was involved in the whirlpool of controversy. It was an imaginary number. The 12th-century Indian mathematician Baisgaro was considered the first person to face the imaginary number. He once said: “The square of a positive negative number is always a positive number; the square root of a positive number has two, one positive and one negative; the negative number has no square root because of its non-squared number.” Sadly, Baisgaro let it slip when he was about to see an imaginary number. Let imaginary numbers slip away, not just Baisgaluo. Before the Italian mathematician Kardan (1501 - 1576)