Material for a workshop on abjad-numerals

This workshop was held in Istanbul on August 23, 2013, at the Second International Summerschool of the Prof. Dr. Fuat Sezgin Foundation


Handout with exercises

Digitized version of the entire astronomical manuscript Or. 1442 in Utrecht University Library. Most of this mansucript is part of the This is taken from al0-Zij al-mulakhkhas min al-shahi ala al-rasad al-ala-i by Athir al-Din Mufaddal ibn `Umar al-Abhari (died ca. 1265 CE in Iran).
The sine table is in p. 35 of this document, see link

The astrolabe of al-Ashraf, Sultan of Yemen (1291) in the Metropolitan Museum of Art, New York City.

The Abbasid astrolabe in the History of Science Museum (Museo Galileo) in Florence, Italy. 2020