Mi?yar al-ash?ar wa-Mizan al-afkar fi sharh Mi?yar al-ash?ar

Nasir al-Din Tusi (d. 672/1274) was an influential philosopher, theologian, mathematician and astronomer, besides being the first director of the famous observatory at Maraghah near Tabriz as well as a man of politics. Author of a large number of scholarly works, he is especially famous for such treatises as his Tajrid al-i?tiqad on theology, the Zij-i Ilkhani on astronomy, the Hall mushkilat al-Isharat, his influential commentary on Avicenna's (428/1037) Kitab al-isharat wal-tanbihat on philosophy and logic, and his Akhlaq-i Nasiri on ethics. The present work contains an edition of a compendium on Persian and Arabic metrics which Tusi says he wrote at the request of some friends, probably at the time of his association with the Ismailis, before the Mongol invasion and the collapse of the Nizari state in 654/1256. It is followed by the edition of a detailed commentary on it by the Indian scholar Muhammad Sa?dallah Muradabadi (d. 1294/1877). Persian, interspersed with Arabic.