#### Quote of the day

This book, conceived in sorrow, composed in grief, and constructed at the brink of despair, contains my mind's best thoughts, and my soul's triumph over the powers of darkness.

#### Paul Halmos

**Born:**March 3, 1916

**Died:**October 2, 2006

**(aged 90)**

**Bio:**Paul Richard Halmos was a Hungarian-Jewish-born American mathematician who made fundamental advances in the areas of mathematical logic, probability theory, statistics, operator theory, ergodic theory, and functional analysis.

**Known for:**

- Finite-dimensional vector spaces (1942)
- Naive Set Theory (1960)
- Linear algebra problem book (1995)
- Lectures on ergodic theory (1956)
- Logic as algebra (1998)