Guide to Operations on Irrational Radicals for Neophytes
This mathematical treatise by Muḥammad b. Abi al-Fatḥ Muḥammad b. al-Sharafī Abi al-Rūḥ ‘Īsā b. Aḥmad al-Ṣūfī al-Shāfi‘ī al-Muqrī, was written in 1491-92 (897 AH). It begins with a "General Introduction," followed by two main parts, with a concluding section on the study of cubes and cube roots. Part I, "Operations on Simple Irrational Radicals," is divided into four chapters. Chapter 1 covers simplification of radicals. Chapters 2, 3, and 4 deal respectively with the multiplication, addition and subtraction, and division of radicals. Part II, on "Operations with Compound ...
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National Library and Archives of Egypt
Divan of Sultan Husayn Mirza
This folio includes ten lines of poetry from a divan (compendium of poems) written in Chagatay Turkish by the last Timurid ruler, Sultan Husayn Mirza (1438–1506). Executed in nasta'liq script through a process of découpage, the fragment belongs to a now dispersed manuscript possibly calligraphed by Sultan 'Ali al-Mashhadi around 1490. Sultan Husayn Mirza b. Mansur b. Bayqara was ruler of Khurasan, based in its capital city of Herat (present-day Afghanistan), from 1469 to his death in 1506. The city was an important cultural center, attracting both Turkish ...
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Library of Congress