Little is known of Bahmanyar's life. He most likely started his studies in philosophy along with Abu al-Qasim al-Kirmani in the
Buyid city of
Ray in northern Iran. There they both became involved in the administration, while they read
Avicenna works. Bahmanyar was possibly part of the Buyid court in Ray through family ties with the Bavandid princess
Sayyida Shirin, her husband
Fakhr al-Dawla () and son
Majd al-Dawla (), both Buyid rulers of Ray. Bahmanyar eventually started to interact with Avicenna, which would later result in the latter's creation of the
al-Mubāḥathāt ("The Discussions"), which were mainly answers to questions made by Bahmanyar. The work was compiled sometime between 1024 and 1037, during Avicenna's stay in
Isfahan, the capital of the
Kakuyid ruler
Muhammad ibn Rustam Dushmanziyar (). In the work, Bahmanyar is referred to as
al-Shaykh al-fāḍil ("the aristocratic gentleman"). Bahmanyar and Avicenna possibly encountered each other in 1014/5 at Ray, when the latter worked for Sayyida Shirin and Majd al-Dawla. Bahmanyar's main work, the
Kitāb al-taḥṣīl ("The Summation"), which summarises Avicenna's logic, physics and metaphysics was written between 1024 and 1037 and dedicated to his Zoroastrian uncle, Abu Mansur Bahram ibn Khurshid ibn Yazdyar, who was possibly the son of the
treasurer of the Buyid emperor
Adud al-Dawla ().
Abu'l-Hasan Bayhaqi (d. 1169) writes that Bahmanyar also wrote a book on logic and one on music and other works are attributed to him. == Beliefs ==