AbulHasan alUqlidisi

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Abu'l Hasan Ahmad ibn Ibrahim Al-Uqlidisi was an Arab mathematician, possibly from Damascus He wrote the earliest surviving book on the Hindu place-value system, known in the west as Arabic numerals, around 952. It is especially notable for its treatment of decimal fractions, and that it showed how to carry out calculations without deletions.

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es:Abu'l Hasan Ahmad ibn Ibrahim Al-Uqlidisi fr:Abu'l-Hasan al-Uqlidisi