Georges Giraud

Georges Julien Giraud (22 July 1889 he is mainly known for his solution of the regular oblique derivative problem and also for his extension to –dimensional singular integral equations of the concept of symbol of a singular integral, previously introduced by Solomon Mikhlin.

Biography

Honors

The scientific work of Georges Giraud was widely acknowledged and earned him several prizes, mainly, but not exclusively, awarded him by the French Academy of Sciences: he was seven times recipient of academy prizes.

In 1919, he was awarded the "Prix Francœur" for his work on the theory of automorphic functions: the members of the commission who examined his work and nominated him were Camille Jordan, Paul Appell, Marie Georges Humbert, Jacques Hadamard, Édouard Goursat, Joseph Boussinesq, Léon Lecornu and Émile Picard (the relator). For the same motivation, On 17 December 1923 he was awarded the "Gustave Roux" prize.

In 1924 he won the Hirn Foundation Prize, for his whole scientific work: he won again the same prize in 1935, for his work on singularities of boundary value problems in the theory of partial differential equations.

In 1928 Giraud won the "Grand Prix des sciences Mathématiques" for his work in the theory of partial differential equations: for the same motivation, in 1930 he was also awarded the "Prix Houllevigue". In the same year, he was also awarded the prize of the Lasserre foundation.

In 1933 he was recipient of the Prix Saintour, for his work on partial differential and integral equations.

Finally, in 1935, apart from winning the Hirn foundation prize for a second time, the members of the jury who awarded ex-aequo the prize were Guido Fubini, Mauro Picone and Giovanni Sansone.

On 14 December 1936, following up a proposal Jacques Hadamard made since 1931, he was elected corresponding member of the French Academy of Sciences.

He was also a member of the Société Mathématique de France from 1913 to his death.

Selected publications

Articles

. , available at NUMDAM. This is one of the first papers, together with independent works of Francesco Tricomi and Solomon Mikhlin, dealing with the multidimensional theory of singular integrals. , available at Gallica. In this short note, Giraud extends (without proof) the formula for the composition of two 2-dimensional singular integral operators using their symbols, introduced shortly before by Solomon Grigor'evich Mikhlin, to higher dimensional singular integrals.

Books . Georges Giraud's doctoral thesis, published also as . , available from the Internet Archive. , reviewed also by . (available from the "Edizione Nazionale Mathematica Italiana"). A book collecting the winning papers of the 1935 prize of the Annali della Reale Scuola Normale Superiore di Pisa.