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|Georges Giraud''" entry in the Enciclopedia Treccani states that he was born on 11 July 1889, and uses this source. |birth_place = Saint-ÉtienneAccording to and to the " Istituto dell'Enciclopedia Italiana|2008}}|Georges Giraud" entry in the Enciclopedia Treccani. |death_date = |death_place = Bonny-sur-Loire |nationality = French |fields = |workplaces = Université Clermont-Ferrand (now Université Blaise Pascal). |alma_mater = École Normale Supérieure 1915 |doctoral_advisor = Charles Émile Picard |academic_advisors = |doctoral_students = |notable_students = |known_for = |influences = |influenced = |awards = Georges Julien GiraudAccording to the Les Secrétaires Perpétuelles|1939}}|year 1939 list of corresponding members of the "Geometry" section of the French Academy, this was his full name: however, he simply sign himself as "Georges Giraud" in all his scientific works. (22 July 1889 – 16 March 1943) was a French mathematician, working in potential theory, partial differential equations, singular integrals and singular integral equations:See and . 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.He announced his results in the short communication , without proof and acknowledging the previous work of Solomon Mikhlin. As a matter of fact, it was Mikhlin who gave the first proofs of these formulas, completing his work on the 2-dimensional theory: see or the entry "Singular integrals" for a comprehensive historical survey.
In 1919, he was awarded the "Prix Francœur" for his work on the theory of automorphic functions:See the Les Secrétaires Perpétuelles|1919}}|22 December 1919 relation on the Prix Francœur in the "Comptes rendus". 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). Ibid. (Les Secrétaires Perpétuelles|1919}}|1919, p. 1202). For the same motivation,See the Les Secrétaires Perpétuelles|1923}}|17 December 1923 relation on the Prix Gustave Roux in the "Comptes rendus", and reference . On 17 December 1923 he was awarded the "Gustave Roux" prize.According to the Les Secrétaires Perpétuelles|1923}}|17 December 1923 relation on the Prix Gustave Roux in the "Comptes rendus", the members of the examining commission were Albin Haller, Guillaume Bigourdan, Antoine Lacroix, Léon Guignard, Paul Appell, and Émile Picard again as the relator.
In 1924 he won the Hirn Foundation Prize, for his whole scientific work:See the Les Secrétaires Perpétuelles|1924}}|22 December 1924 relation on the Hirn Foundation prize in the "Comptes rendus", and reference . According to the first reference, the amount of the prize was 2500 . he won again the same prize in 1935,See the Les Secrétaires Perpétuelles|1935}}|16 December 1935 relation on the Hirn Foundation prize in the "Comptes rendus", and reference . for his work on singularities of boundary value problems in the theory of partial differential equations." ..., pour sex travaux sul les singularités dans les problèmes aux limites de la théorie des équations aux dérivées partielles", as it is precisely stated in the Les Secrétaires Perpétuelles|1935}}|relation on the 1935 Hirn Foundation prize.
In 1928 Giraud won the "Grand Prix des sciences Mathématiques" for his work in the theory of partial differential equations:See the Les Secrétaires Perpétuelles|1928}}|17 December 1928 relation on the Gran Prix des sciences mathématiques in the "Comptes rendus", and reference . for the same motivation, in 1930 he was also awarded the "Prix Houllevigue".See the Les Secrétaires Perpétuelles|1930}}|15 December 1930 relation on the Prix Houllevigue in the "Comptes rendus", and reference . In the same year, he was also awarded the prize of the Lasserre foundation.See .
In 1933 he was recipient of the Prix Saintour, for his work on partial differential and integral equations.See the Les Secrétaires Perpétuelles|1933}}|11 December 1933 relation on the Prix Saintour in the "Comptes rendus", and reference .
Finally, in 1935, apart from winning the Hirn foundation prize for a second time, he was awarded the prize of the Annali della Reale Scuola Normale Superiore di Pisa, equally divided between him, Guido Ascoli and Pietro Buzano:See and . the members of the jury who awarded ex-aequo the prize were Guido Fubini, Mauro Picone and Giovanni Sansone.According to , who reports excerpts from the conclusive relation of the jury. states also that the amount of the prize awarded to each of the three winners was 2000 .
On 14 December 1936, following up a proposal Jacques Hadamard made since 1931,See . Precisely, Jacques Hadamard presented Giraud for the election as corresponding member of the French Academy for three times, the first two being on 12 and on 26 January 1931. he was elected corresponding member of the French Academy of Sciences.See the obituary notices by , and , and also the Les Secrétaires Perpétuelles|1930}}|14 December 1936 announcement of his election reporting the detailed election results.
He was also a member of the Société Mathématique de France from 1913 to his death.See reference .
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