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.
Saheb Qiblah Fultali Abdul Latif Chowdhury (Bengali: আব্দুল লতিফ চৌধুরী ; 25 May 1913 – 16 January 2008), widely known as Saheb Qiblah Fultali, was a Bangladeshi Islamic scholar of theology, philosophy, murshid, spiritual esotericist, and spiritual leader.