#### Quote of the day

Users do not care about what is inside the box, as long as the box does what they need done.

#### Ronald Graham

**Born:**October 31, 1935

**(age 83)**

**Bio:**Ronald Lewis "Ron" Graham is a mathematician credited by the American Mathematical Society as being "one of the principal architects of the rapid development worldwide of discrete mathematics in recent years".

**Known for:**

- Concrete Mathematics (1994)
- Rudiments of Ramsey theory (1981)
- Ramsey Theory (1980)