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【数学】十一世纪,宋朝的《梦溪笔谈》中提出“隙积术”,开始高阶等差级数的研究(中国沈括)。十一世纪,第一次解出x~(2n)+an~n=b型方程的根(阿拉伯阿尔·卡尔希)。十一世纪,完成了一部系统研究三次方程的书《代数学》(阿拉伯卡牙姆)。十一世纪,解决了“海赛姆”问题,即在圆的平面上两点作两条线相交于圆周上一点,并与在该点的法线成等角(埃及阿尔·海赛姆)。
【Mathematics】 In the eleventh century, Song Dynasty “Meng Xi Bi Tan” put forward the theory of “gap plot technique” and started the study of the high-order arithmetic progression series (China Shen Kuo). For the first time in the eleventh century, the roots of the x ~ (2n) + an ~ n = b-type equations (Arabian Karl’s) were solved. In the eleventh century, a book “Algebra” (Arabian cardinal), which systematically studied the cubic equation, was completed. In the eleventh century, the issue of “Hessem” was solved. That is, two lines intersect two points on a circle in a circle at a point on the circumference and at an equiangular angle with the normal at that point (Al Haesim, Egypt) .