Around 1000 years ago, Persian mathematician Al Karaji first asked how many congruent numbers existed. But just what are congruent numbers? The numbers are the area of right-angle triangles with ...

Al-Samaw-al Polynomial. Illustration of the al-Bahir fi'l-Jabr "The Brilliant in Algebra" from the 12th century. Al-Samaw'al wrote the mathematical treatise al-Bahir fi'l-jabr, meaning "The brilliant ...

之所以能够在9世纪初的阿拉伯地区产生像花拉子密这样伟大的科学家绝对不是偶然的，这是政治、经济、文化等多方面因素共同作用的结果。据推断花拉子密出生在公元8世纪的最后一个十年，并在当时学风盛行的巴格达接受教育。阿拔斯王朝第七任哈里发马蒙（al-Ma’mūn，813-833）在巴格达修建了“智慧宫”并开启了“百年翻译运动”。花拉子密在这一时期被邀请到“智慧宫”工作，完成了《代数学》并在该书序言中表达了对 ...

首先在方程化简领域取得突破性进展的是卡拉吉（al-Karaji，953-约1029），他的工作使得代数学进一步“独立”， 相当于系统地将加、减、乘、除、比例和开方这几种基本算术方法应用于代数表达式。随后的萨马瓦尔（al-Samaw’al，约1130-约1180）进一步发展了凯拉吉 ...

Dozens killed in southern Gaza attack as UN rights chief warns of ‘atrocity crimes’ in Israel’s offensive in north. ‘Ethnic cleansing’ happening in Gaza, Jordan’s FM tells Blinken ...

All the updates as Liverpool beat Chelsea in a feisty clash at Anfield to leapfrog Man City and go top of the league. European Union leaders have called for new legislation to ‘speed up returns ...