# Mathematician:Guillaume de l'Hôpital

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## Contents

## Mathematician

French mathematician best known for L'Hôpital's Rule, although this was in fact discovered by Johann Bernoulli.

## Nationality

French

## History

- Born: 1661 in Paris, France (precise date uncertain)
- Died: 2 Feb 1704 in Paris, France

## Theorems

Results named for **Guillaume de l'Hôpital** can be found here.

## Books and Papers

- 1696:
*L'Analyse des Infiniment Petits*(considered to be the first textbook on calculus) - 1707:
*Traité anlytique des sections coniques*

## Notable Quotes

*I have made free use of their [ the Bernoulli brothers ] discoveries, so that I frankly return to them whatever they please to claim as their own.*

## Also known as

**Guillaume de l'Hôpital** is the shortened version of his full name and title, which was: **Guillaume-François-Antoine Marquis de l'Hôpital, Marquis de Sainte-Mesme, Comte d'Entremont and Seigneur d'Ouques-la-Chaise**.

Some sources omit the hyphens: **Guillaume François Antoine Marquis de l'Hôpital**.

His name is alternatively rendered **l'Hospital**, which was how he himself rendered it -- however, the French language changed and the silent **s** was changed to a circumflex.

Whether the surname is prefixed with an uppercase **L** or not is also variable: **l'Hôpital** or **L'Hôpital**.

## Sources

- John J. O'Connor and Edmund F. Robertson: "Guillaume de l'Hôpital": MacTutor History of Mathematics archive

- 1992: George F. Simmons:
*Calculus Gems*... (previous) ... (next): Chapter $\text {A}.20$: The Bernoulli Brothers - 2008: David Nelson:
*The Penguin Dictionary of Mathematics*(4th ed.) ... (previous) ... (next): Entry:**L'Hôpital (**or**L'Hospital), Guillaume François Antoine, Marquis de**(1661-1704) - 2014: Christopher Clapham and James Nicholson:
*The Concise Oxford Dictionary of Mathematics*(5th ed.) ... (previous) ... (next): Entry:**l'Hôpital, Guillaume François Antoine, Marquis de**(1661-1704) - 2014: Christopher Clapham and James Nicholson:
*The Concise Oxford Dictionary of Mathematics*(5th ed.) ... (previous) ... (next): Entry:**l'Hôpital, l'Hôpital's Rule**