#### Marston Morse

**Born:**March 24, 1892

**Died:**June 22, 1977

**(aged 85)**

**Bio:**Harold Calvin Marston Morse was an American mathematician best known for his work on the calculus of variations in the large, a subject where he introduced the technique of differential topology now known as Morse theory.

**Known for:**

- The calculus of variations in the large (1934)
- Global variational analysis (1976)
- Introduction to analysis in the large (1947)