Famous Mathematicians from Türkiye

 

Cahit Arf (1910–1997)

Universally considered the greatest modern Turkish mathematician. He is best known for the **Arf invariant** (of quadratic forms in characteristic 2, with applications in topology and knot theory), the **Hasse–Arf theorem** in ramification theory, and concepts such as Arf rings and Arf closures. Educated in France and Germany (PhD under Helmut Hasse in Göttingen), he played a major role in building modern mathematical research and institutions in Turkey, including early leadership of TÜBİTAK. His portrait appears on the reverse of the Turkish 10-lira banknote (shown below).

Ali Kuşçu (Ali Qushji, 1403–1474)

The leading Ottoman mathematician and astronomer of the 15th century. Trained in the Samarkand scientific circle under Ulugh Beg, he later moved to Istanbul under Mehmed II (the Conqueror). He wrote important treatises on arithmetic (*Muhammadiyya*) and astronomy (*Fathiyya*), contributed to the teaching of mathematics in Ottoman madrasas, calculated Istanbul’s coordinates with high accuracy, and helped transfer advanced mathematical and astronomical knowledge into the Ottoman world.

 Kerim Erim (1894–1952)

A foundational figure in the establishment of modern (Western-style) mathematics in the Turkish Republic. He was among the first Turks to earn a doctorate in mathematics (in Germany) and served for many years as head of the Mathematics Institute at Istanbul University. He worked on the foundations of mechanics, analysis, and the philosophy of mathematics, and was instrumental in training the next generation of Turkish mathematicians and modernizing university mathematics education.

(Image: www.msxlabs.org)

Ali Nesin (born 1956/1957)

The most prominent contemporary Turkish mathematician in terms of both research and public impact. His research is in model theory and algebra (especially groups of finite Morley rank). He is best known for founding the **Nesin Mathematics Village** near Şirince in 2007 — an independent residential center that has trained thousands of students and researchers and significantly raised the level and visibility of mathematics education in Turkey. He received the International Mathematical Union’s Leelavati Prize in 2018 for this work.

These four span the major eras of Turkish mathematical history: the classical Ottoman period (Ali Kuşçu), the early Republican modernization (Kerim Erim), the mid-20th-century research flowering (Cahit Arf), and the present day (Ali Nesin). Other notable names frequently mentioned include Gelenbevi İsmail Efendi (18th century), Feza Gürsey (theoretical physics/mathematics), and Masatoshi Gündüz İkeda (algebra).