R
- Srinivasa Ramanujan (1887-1920)
- Born in India.
- He opened lines of investigation into far more efficient estimates of pi than those in existence.
- Georg Friedrich Bernhard Riemann (1826-1866)
- Born in Germany.
- He developed a general theory of functions of a complex variable.
- He investigated the conformal representation of areas, one on the other.
- He also worked on linear differential equations with algevraic coefficients.
