# Henri Lebesgue

**Henri Léon Lebesgue** ForMemRS[1] (French: [ɑ̃ʁi leɔ̃ ləbɛɡ]; June 28, 1875 – July 26, 1941) was a French mathematician known for his theory of integration, which was a generalization of the 17th-century concept of integration—summing the area between an axis and the curve of a function defined for that axis. His theory was published originally in his dissertation *Intégrale, longueur, aire* ("Integral, length, area") at the University of Nancy during 1902.[3][4]

Henri Lebesgue | |
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Born | |

Died | July 26, 1941 66) | (aged

Nationality | French |

Alma mater | École Normale Supérieure University of Paris |

Known for | Lebesgue integration Lebesgue measure |

Awards | Fellow of the Royal Society[1] Poncelet Prize for 1914[2] |

Scientific career | |

Fields | Mathematics |

Institutions | University of Rennes University of Poitiers University of Paris Collège de France |

Doctoral advisor | Émile Borel |

Doctoral students | Paul Montel Zygmunt Janiszewski Georges de Rham |