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**Laurent Carl Siebenmann** (the first name is sometimes spelled Laurence or Larry) (born 1939) is a Canadian mathematician based at the Université de Paris-Sud at Orsay, France.

Laurent C. Siebenmann | |
---|---|

Born | 1939 |

Alma mater | University of Toronto Princeton University |

Awards | Jeffery–Williams Prize |

Scientific career | |

Fields | Mathematics |

Institutions | University of Paris-Sud |

Doctoral advisor | John Milnor |

Doctoral students |

After working for several years as a Professor at Orsay he became a Directeur de Recherches at the Centre national de la recherche scientifique in 1976. He is a topologist who works on manifolds and who co-discovered the Kirby–Siebenmann class.

Siebenmann's undergraduate studies were at the University of Toronto. He received a Ph.D. from Princeton University under the supervision of John Milnor in 1965 with the dissertation *The obstruction to finding a boundary for an open manifold of dimension greater than five*. His doctoral students at Orsay included Francis Bonahon and Albert Fathi.

In 1985 he was awarded the Jeffery–Williams Prize by the Canadian Mathematical Society.^{[1]} In 2012 he became a fellow of the American Mathematical Society.^{[2]}

- Kirby, Robion C.; Siebenmann, Laurence C. (1977).
*Foundational Essays on Topological Manifolds, Smoothings, and Triangulations*(PDF). Annals of Mathematics Studies. Vol. 88. Princeton, NJ: Princeton University Press. ISBN 0-691-08191-3. MR 0645390.

- Kirby and the promised land of topological manifolds: memories and memorable arguments; a talk by Siebenmann
- Photos at Oberwolfach
- Home page
- Laurent C. Siebenmann at the Mathematics Genealogy Project