# Mathematician:Marie-Sophie Germain

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## Mathematician

French mathematician who contributed to differential geometry and number theory, and provided some insights into aspects of Fermat's Last Theorem.

She was completely self-taught (as women were not encouraged to do that sort of thing in those days) and contributed her early work under the pseudonym **Monsieur LeBlanc**.

Had Gauss and Lagrange as mentors, but apart from that, suffered throughout her career from prejudice against her gender.

## Nationality

French

## History

- Born: April 1, 1776, Paris, France
- Died: June 27, 1831, Kent, England

## Theorems and Definitions

Results named for **Marie-Sophie Germain** can be found here.

Definitions of concepts named for **Marie-Sophie Germain** can be found here.

## Publications

*Oeuvres Philosophique de Sophie Germain*

## Also known as

Usually referred to as **Sophie Germain**.

Famously wrote under the pseudonym **Monsieur LeBlanc**.

Some sources render her name as **Sophie Marie Germain**.

## Sources

- John J. O'Connor and Edmund F. Robertson: "Marie-Sophie Germain": MacTutor History of Mathematics archive

- 1998: David Nelson:
*The Penguin Dictionary of Mathematics*(2nd ed.) ... (previous) ... (next): Entry:**Germain, Sophie Marie**(1776-1831) - 2008: David Nelson:
*The Penguin Dictionary of Mathematics*(4th ed.) ... (previous) ... (next): Entry:**Germain, Sophie Marie**(1776-1831) - 2008: Ian Stewart:
*Taming the Infinite*... (previous) ... (next): Chapter $7$: Patterns in Numbers: Gauss