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unusual facts about Al-Hassār



Hassar

Abu Bakr al-Hassar, 11th century Muslim mathematician who first used the fraction bar, also called the vinculum.

Irrational number

Al-Hassār, a Moroccan mathematician from Fez specializing in Islamic inheritance jurisprudence during the 12th century, first mentions the use of a fractional bar, where numerators and denominators are separated by a horizontal bar.

Sidi Hajjaj Oued Hassar

Sidi Hajjaj Oued Hassar is a small town and rural commune in Kénitra Province of the Grand Casablanca region of Morocco.


see also