Al-Khwarizmi's seminal work, 'Kitāb al-muḫtaṣar fī ḥisāb al-ğabr waʾl-muqābala', is widely recognized for systematizing which specific branch of mathematics, giving it its name?

Explanation

Al-Khwarizmi's book 'Kitāb al-muḫtaṣar fī ḥisāb al-ğabr waʾl-muqābala' (The Compendious Book on Calculation by Completion and Balancing) is considered the foundational text of algebra, and the word 'algebra' itself is derived from the Arabic 'al-jabr' in the title.