Abstract
The article is devoted to the manuscript heritage of great Azerbaijani thinker, Nasir al-Din al-Tusi in the field of mathematics and astronomy. His manuscripts are stored in various scientific repositories around the world. The number of scientific works, translations, commentaries and correspondence reaches 190. This study contains facsimiles of some manuscripts written by Nasir al-din al-Tusi. The author firstly investigates the main themes of “Tahrir Iglidis fi ilmi Handasa” written in Arabic. Following the study, as one of the most common books on the writings of Euclid and Almagest, “Usulu-l-handasa fi Iglidis” is thoroughly studied. At the same time, the author studies the manuscripts written in Persian, “Si Fasl” (30 chapters) and “Astrolabe” (containing the rules for using the astrolabe to calculate the trajectory of motion of celestial bodies in relation to the center of the Earth) and bring clarity to the main chapters of these manuscripts.
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