Abū al-Ḥasan ibn ʿAlī al-Qalaṣādī (1412–1486) took "the first steps toward the introduction of algebraic symbolism".
Abū al-Ḥasan ibn ʿAlī al-Qalaṣādī (1412–1486) mengambil "langkah-langkah pertama menuju perkenalan simbolisme aljabar".