A Survey of the Contents of Majmūʻ al-Murabbaʻāt by Muḥammad Bāqir Yazdī (17th century)

Majmūʻ al-Murabbaʻāt or The sum of square numbers is an unknown treatise of Muḥammad Bāqir Yazdī (alive in 1638 A.D.). It was believed to be a part of his ʻUyūn al-Ḥisāb, but it became clear to the researchers that it is an independent one. This treatise contains introduction and analysis of some propositions about the sum of odd and even square numbers and examines the sum of how many of these square numbers results in a square number. Evidently this mathematical problem was an issue of interest for Islamic scientists such as Naṣīr al-Dīn al-Ṭūsī, Abū Jaʻfar al-Khāzin and Kamāl al-Dīn ibn Yūnus.