His book On the Calculation with Hindu Numerals, written about 825, along with the work of Al-Kindi, were instrumental in spreading Indian mathematics and Indian numerals to the West.
O seu libro Sobre o cálculo con numerais indios, escrito arredor de 825, xunto co traballo de Al-Kindi, foron fundamentais na extensión das matemáticas e os numerais indios en occidente.