[Pramāṇa](https://indike.org/pramana/) › [Foreign](https://indike.org/pramana/inf) › [Hebrew & Jewish](https://indike.org/pramana/inf.he) › [Medieval Hebrew and Judaeo-Arabic literature](https://indike.org/pramana/inf.he.medieval) › [Abraham ibn Ezra](https://indike.org/pramana/inf.he.medieval.ibn-ezra) › ספר המספר # ספר המספר Sefer ha-Mispar (Book of Number) Arithmetic textbook that teaches the decimal place-value system with the nine figures "of the Indians" and a sign for zero (galgal). - **Language:** Hebrew - **Date:** 1146–1160 CE - **Author:** [Avraham ibn ʿEzra](https://indike.org/pramana/person/abraham-ibn-ezra) - **Text:** not yet digitised (catalogue entry) --- Source: [https://indike.org/pramana/inf.he.medieval.ibn-ezra.sefer-ha-mispar](https://indike.org/pramana/inf.he.medieval.ibn-ezra.sefer-ha-mispar) · Pramāṇa