While the Persian mathematician Jamshīd al-Kāshī claimed to have discovered decimal fractions himself in the 15th century, J. Lennart Berggrenn notes that he was mistaken, as decimal fractions were first used five centuries before him by al-Uqlidisi as early as the 10th century.
^ abBerggren, J. Lennart (2007). "Mathematics in Medieval Islam". The Mathematics of Egypt, Mesopotamia, China, India, and Islam: A Sourcebook. Princeton University Press. p. 518. ISBN978-0-691-11485-9.
^The Arithemetics of Al-Uqlisidi, The story of Hindu-Arabic Arithematic, translated and annotated by A.S.Saidan, D.Reidel Publishing Company,Boston, 1978