Who did more ring theory, Cahit Arf or Sind ibn Ali?
Sind ibn Ali He is known to have translated and modified the Zij al-Sindhind. The Zij al-Sindhind was the first astronomical table ever introduced in the Muslim World. As a mathematician Sind ibn ʿAlī was a colleague of al-Khwarizmi and worked closely with Yaqūb ibn Tāriq together they calculated the diameter of the Earth and other astronomical bodies. He also wrote a commentary on "Kitāb al-ğabr wa-l-muqābala" and helped prove the works of al-Khwarizmi. The decimal point notation to the Arabic numerals was introduced by Sind ibn Ali.
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.