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 ...

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 ...

In the 10th century, 800 years before Gauss, a Persian named Al-Karaji proved a formula for the sum of the first 100 natural numbers, as well as the first descriptions of the binomial theorem.

Al Pacino may be an Oscar-winning actor known for roles in “The Godfather,” “Scarface” and more, but he’s also a family man. Pacino, who has never been married, welcomed three children ...

Al-Qaeda's attacks on US soil were the deadliest in its history On the 19th anniversary of the 9/11 attacks in the US, the perpetrator - the then-Afghan based jihadist group al-Qaeda - is in a ...

Using intimidation and violence, Somalia-based Islamist militant group al-Shabab raises as much revenue as the country's authorities, a report says. The militants collect at least $15m (£11m ...

Al Pacino is a father to three adult children and a toddler Sarah Title is a contributing writer at PEOPLE. She has been working at PEOPLE since 2022. Her work has previously appeared in Brides ...

When Al Jazeera launched from the Qatari capital, Doha, on Friday, November 1, 1996, it was the first independent news channel in the Arab world. Media in the Arab world, till then, was ...

Al Pacino, at age 83, welcomed a baby with ex-girlfriend Noor Alfallah in June 2023 Skyler Caruso is a Writer and Reporter of PEOPLE Digital Entertainment. She joined PEOPLE in 2021, but has eight ...

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 ...