TAG di Manoscritti Washington (D.C.) Early works to 1800 Library of Congress Manuscripts, Arabic Mathematics, Arab digital collection World Digital Library Ma?m?d al-Im?m Man??r? A?mad ibn Mu?ammad Ibn al-H??im Arithmetic early works to 1900 ibn al-h??im, a?mad ibn mu?ammad Badr al-D?n Mu?ammad ibn Mu?ammad Sib? al-M?rid?n? ?Abd All?h ibn ?ajj?j Ibn al-Y?sam?n Algebra ??h? Y?suf