Umdetü'l-hesap - عمدة الحساب

This volume contains an arithmetical treatise by Matrakçı Nasuh, also known as Nasuh el-Silahi el-Matraki, Nasuh İbn-i Abdullah, and Nasuh bin Karagöz bin Abdulla el-Visokavi el-Bosnavi (died 1564 CE, although his date of death is given as 940 AH/1533-34 CE by OM and 943 AH/1536-37 CE by Karatay). Matrakçı Nasuh was a Bosniak polymath who is known as a superlative player of the sport matrak, as well as a geographer, historian, teacher, swordsman, navigator, painter and inventor. In addition to the current work, he penned two other treatises on mathematics, Cemalü'l-küttab and Kemalü'l-hesap. . This work, which contains many diagrams, is divided into two kısım, the first being subdivided into 24 fusul. Most of the arithmetical problems have a practical application to the laws of inheritance. On several folios, space has been left for diagrams which were, apparently, never copied. The current manuscript was copied in 950 AH (1543-44 CE).

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For further information on the author, see OM III, p. 305; the Ministry of Culture of the Republic of Turkey (https://www.ktb.gov.tr/EN-117628/nasuh-matrakci.html); and Muslim Heritage (https://muslimheritage.com/nasuh-al-matraki-a-noteworthy-ottoman-artist-mathematician-of-the-sixteenth-century/).