TAG di Manoscritti Arithmetic Washington (D.C.) Early works to 1800 Library of Congress Manuscripts, Arabic Mathematics, Arab early works to 1900 digital collection World Digital Library Ma?m?d al-Im?m Man??r? A?mad ibn Mu?ammad Ibn al-H??im ibn al-h??im, a?mad ibn mu?ammad luma? al-yas?rah f? ?ilm al-?is?b Badr al-D?n Mu?ammad ibn Mu?ammad Sib? al-M?rid?n? murshidah f? ?in??at al-ghub?r poetry