#### Quote of the day

We owe something to extravagance, for thrift and adventure seldom go hand in hand.

#### Serge Lang

**Born:**May 19, 1927

**Died:**September 12, 2005

**(aged 78)**

**Bio:**Serge Lang was a French-born American mathematician. He is known for his work in number theory and for his mathematics textbooks, including the influential Algebra. He was a member of the Bourbaki group.

**Known for:**

- A First Course in Calculus (1964)
- Basic Mathematics (1971)
- Undergraduate analysis (1983)
- Undergraduate Algebra (1987)
- Introduction to Linear Algebra (1970)