# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/guillaume-de-l-hopital
# Generated: 2026-08-31T16:54:42.888Z

schema: https://schema.org/Person
url: "https://fame.am/person/guillaume-de-l-hopital"
name: "Guillaume de l'Hôpital"
slug: "guillaume-de-l-hopital"
description: "His name is on the rule every calculus student learns for rescuing limits that collapse into 0/0 — except he didn't invent it. He published it first, in 1696, and that was enough to make it his forever."
tagline: "French noble and mathematician (*1661 – †1704)"
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gender: "male"
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birthDate: "1661"
deathDate: "1704-02-02"
livingStatus: "DECEASED"
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# bio (long form, separated for readability)
bio: |
  Guillaume François Antoine, Marquis de l'Hôpital was a French mathematician born 7 June 1661. In 1696 he published Analyse des Infiniment Petits pour l'Intelligence des Lignes Courbes, the first systematic exposition of differential calculus in print. The treatise introduced l'Hôpital's rule — the technique for calculating limits involving indeterminate forms 0/0 and ∞/∞ — though the rule itself originated elsewhere. The book went through several editions and translations, becoming the model for how calculus would be taught for generations. He died 2 February 1704, his name sealed to a method he made canonical but did not create.