Sind_ibn_Ali
Sanad ibn Ali
Marhematician who introduced the decimal point
Abu al-Tayyib Sanad ibn Ali, also known as Sind ibn Ali (died c. 864 C.E.),[1] was a ninth-century astronomer, translator, mathematician and engineer during Islamic Golden Age who was employed at the court of the Abbasid caliph Al-Ma'mun. A later convert to Islam, Sanad's father was a learned astronomer who lived and worked in Baghdad.[2]