Guillaume de l'Hôpital
French noble and mathematician (*1661 – †1704)
- Fame53.7
- Momentum0.0
- Academics rank#102
Source-basedStable
- Fame53.7
- Momentum0.0
- Academics rank#102
- Wikipedia6.3K
Lived 1661–1704, aged 43
AcademicsAcademic
Summary
Updated 2026-06-11
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.
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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…
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