Quote of the day
Happiness includes chiefly the idea of satisfaction after full honest effort. No one can possibly be satisfied and no one can be happy who feels that in some paramount affairs he failed to take up the challenge of life.
Julian Coolidge

Born: September 28, 1873
Died: March 5, 1954 (aged 80)
Bio: Julian Lowell Coolidge was an American mathematician and a professor and chairman of the Harvard University Mathematics Department.
Known for:
- A history of geometrical methods (1940)
- A Treatise on Algebraic Plane Curves (1931)
- A treatise on the circle and sphere (1916)
- The mathematics of great amateurs (1949)
- The elements of non-Euclidean geometry (1909)