Anonymous epitome (تلخيص) of a lost treatise by Sharaf al-Dīn al-Muẓaffar ibn Muḥammad al-Ṭūsī (شرف الدين المظفر بن محمد الطوسي; d. 1213) on cubic equations fundamental to algebraic geometry (see the epitomiser's preface, f. 35, lines 2-7, transcribed below and edited by Rashed in Sharaf al-Dīn...
Risālah fī ʿamal ḍilʿ al-musabba‘ al-mutasāwī al-aḍlā‘ fī al-dā‘irah رسالة في عمل ضلع المسبع المتساوي الأضلاع في الدائرة Kūhī, Wayjan ibn Rustum كوهي، ويجن بن رستم
Scope & Content:
Treatise on the construction of an equilateral heptagon within a circle by Abū Sahl Wayjan ibn Rustam al-Kūhī (أبو سهل ويجن بن رستم الكوهي also spelled al-Qūhī [القوهي]; fl. second half of the 10th century). The text contains seven diagrams, which are collected on a fold out (f. 188r) at the en...
Ṭarīq fī istikhrāj khaṭṭayn bayna khaṭṭayn wa-tatawālá ‘alá nisbah طريق في استخراج خطّين بين خطّين وتتوالى على نسبة Kūhī, Wayjan ibn Rustum كوهي، ويجن بن رستم
Scope & Content:
Short geometrical treatise by Abū Sahl Wayjan ibn Rustam al-Kūhī (أبو سهل ويجن بن رستم الكوهي also spelled al-Qūhī [القوهي]; fl. second half of the 10th century). The text contains one diagram, which is presented on a fold out (f. 190r). Contents: Begins (f. 189v, lines 2-): نجعل الخطين ا ب...
Kitāb fī misāḥat qaṭʿ al-makhrūṭ al-mukāfī كتاب في مساحة قطع المخروط المكافي Ibn Sinān, Ibrāhīm ابن سنان، إبراهيم
Scope & Content:
Treatise on the mensuration of conic sections by Ibrāhīm ibn Sinān ibn Thābit ibn Qurrah (إبراهيم بن سنان بن ثابت بن قرّة, d. 946). The text contains seven diagrams, which are collected on a fold out (f. 197r) at the end of the text. Begins (f. 191v, lines 2-3): قد كنت علمت كتابًا في مساحة هذ...
Kitāb fī al-qarasṭūn كتاب في القرسطون Thābit ibn Qurrah al-Ḥarrānī ثابت بن قرّة الحراني
Scope & Content:
Treatise on the static and mechanic theories underpinning the use of a kind of balance by Abū al-Ḥasan Thābit ibn Qurrah al-Ḥarrānī (أبو الحسن ثابت بن قرّة الحرّاني; d. 901). The treatise begins with postulates taken from the Kitāb fī al-thiqal wa-al-khiffah wa-qiyās al-ajrām ba‘ḍihā ilá ba‘ḍ (ك...
