[Pramāṇa](https://indike.org/pramana/) › [Foreign](https://indike.org/pramana/inf) › [Latin](https://indike.org/pramana/inf.la) › [Middle Ages (700 – 1500)](https://indike.org/pramana/inf.la.medieval) › [The Indian numerals in Latin](https://indike.org/pramana/inf.la.medieval.numerals) › Liber abaci # Liber abaci Leonardo of Pisa (Fibonacci), Book of Calculation Leonardo learned 'the art of the nine Indian figures' (modus Indorum) at Bugia and on his travels; chapter 1 begins 'Novem figure indorum he sunt 9 8 7 6 5 4 3 2 1' and with zero writes any number. - **Language:** Latin - **Date:** 1202–1228 CE - **Author:** [Leonardus Pisanus (Fibonacci)](https://indike.org/pramana/person/leonardo-pisano) - **Text:** not yet digitised (catalogue entry) --- Source: [https://indike.org/pramana/inf.la.medieval.numerals.liber-abaci](https://indike.org/pramana/inf.la.medieval.numerals.liber-abaci) · Pramāṇa