Year/Century: 19th century
Language: Arabic
Binding: Original
Description: Najm al-Din 'Ali ibn 'Umar al-Qazwini al-Katibi, a Persian Islamic philosopher and logician of the Shafi`i school, died in AH 675 / 1276 CE. His most important works are a treatise on logic, Al-Risala al-Shamsiyya, and one on metaphysics and the natural sciences, Hikmat al-'Ain. Nice calligraphy, approximately 230 lvs (=460 pp). Some wear and repairs to the binding. Very good interior. He and a few other astronomers, including Nasir al-Din al-Tusi, contributed to the founding of the Maragha observatory. The al-Risala al-Shamsiyya (Logic for Shams al-Din), his work on logic, is "perhaps the most studied logic textbook of all time" and was widely utilized as the first important text on logic at madrasahs up until the twentieth century. Although it is more complex and diverges from the formal Avicennian system of temporal modal logic in some respects, Al-Katibi's logic was heavily influenced by it. Al-Katibi considers many more modalized propositions and investigates thirteen that he deems 'customary to explore', whereas Avicenna considered ten modalities and studied six of them.
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