When he came to Constantinople (present-day Istanbul), his grandson Ghutb al-Dīn Muhammed had a son Mirim Çelebi who would be a great mathematician and astronomer in the future. Ali Kuşçu composed "risalah dar hay’at" in Persian for Mehmed II at Constantinople in 1470. Also he wrote "Sharh e resalye Fathiyeh", "resalye Mohammadiye" in Constantinople, which are in Arabic on the topic of mathematics. He then finished "Sharh e tejrid" on Nasir al-Din al-Tusi 's "Tejrid al-kalam". That work is called "Sharh e Jadid" in scientific community.