Cahit Arf was born on 24 October 1910 in Selanik.In 1912,his family migrated to Istanbul and later,they settled in Izmir where Arf was received primary education.Upon receveing a scholarship from Paris,Ecole Normale Superiore.
Cahit Arf is a important Turkish mathematician.He is Turkiye's best mathematician.He is known for the Arf invariant of a quadratic form in characteristic 2 (applied in knot theory and surgery theory)in topology,the Hasse Arf theorem in ramificiation theory.
Returning to Turkiye,he taught matematics at Galatasaray.In 1933,he joined Istanbul's matematic and Istanbul university.He worked there until his ınvolment with TUBİTAK upon president appointment in 1962.
Arf's portrait was depicted on the reverse of the Turkiye's 10 lira banknote ıssued in 2009
Arf's influence on mathematics in particular was very profound.Although he had very formal students,had fruitful discussions with him about their point of interest.
He faciliated the now-celebrated visit of Robert Langlands(now famus for the Langlards program)during which Langlands worked out some ardous calculations on the epsilon factors of Artin L-Factors