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
- Text
- not yet digitised (catalogue entry)