Who did more ring theory, Cahit Arf or Sind ibn Ali?
Cahit Arf Cahit Arf (] ; 11 October 1910 – 26 December 1997) was a Turkish 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 ramification theory, Arf semigroups, and Arf rings.
Naubat Khan Naubat Khan (also known as Ali Khan Karori) was a prominent Indian classical music composer, musician and instrumentalist. He was an influential musician of his time. The rudra veena, also called the bin, came into prominence during the time of Tansen's contemporary, and son-in-law, Naubat Khan. In the paintings of the time, it is clearly Naubat Khan and not Tansen who is associated with the instrument. Naubat Khan was the honorary title conferred by Mughal Emperor Jahangir on Ali Khan Karori.