Pierre Lelong (14 March 1912 Paris – 12 October 2011)
at the académie des sciences was a French mathematician who introduced the Poincaré–Lelong equation, the Lelong number and the concept of

plurisubharmonic function In mathematics, plurisubharmonic functions (sometimes abbreviated as psh, plsh, or plush functions) form an important class of functions used in complex analysis. On a Kähler manifold, plurisubharmonic functions form a subset of the subharmonic ...

Career

Lelong earned his doctorate in 1941 from the

École Normale Supérieure École may refer to: * an elementary school in the French educational stages normally followed by secondary education establishments (collège and lycée) * École (river), a tributary of the Seine flowing in région Île-de-France * École, Savoi ...

, under the supervision of

Paul Montel Paul Antoine Aristide Montel (29 April 1876 – 22 January 1975) was a French mathematician. He was born in Nice, France and died in Paris, France. He researched mostly on holomorphic functions in complex analysis. Montel was a student of Émile ...

. On 5 June 1981 Lelong received an

honorary doctorate An honorary degree is an academic degree for which a university (or other degree-awarding institution) has waived all of the usual requirements. It is also known by the Latin phrases ''honoris causa'' ("for the sake of the honour") or ''ad hon ...

from the Faculty of Mathematics and Science at

Uppsala University Uppsala University ( sv, Uppsala universitet) is a public university, public research university in Uppsala, Sweden. Founded in 1477, it is the List of universities in Sweden, oldest university in Sweden and the Nordic countries still in opera ...

Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...

. He became a member of the

French Academy of Sciences The French Academy of Sciences (French: ''Académie des sciences'') is a learned society, founded in 1666 by Louis XIV of France, Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French Scientific me ...

in 1985.

Personal life

He married another mathematician,

Jacqueline Ferrand Jacqueline Lelong-Ferrand (17 February 1918, Alès, France – 26 April 2014, Sceaux, Hauts-de-Seine, Sceaux, France) was a French mathematician who worked on conformal map, conformal representation theory, potential theory, and Riemannian mani ...

, in 1947; they separated in 1977..

References

{{DEFAULTSORT:Lelong, Pierre École Normale Supérieure alumni 20th-century French mathematicians 21st-century French mathematicians Members of the French Academy of Sciences Complex analysts Mathematical analysts 2011 deaths 1912 births