Jean Frédéric Auguste Delsarte (19 October 1903,
Fourmies – 28 November 1968,
Nancy) was a French
mathematician
A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems.
Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change.
History
On ...
known for his work in
mathematical analysis
Analysis is the branch of mathematics dealing with continuous functions, limit (mathematics), limits, and related theories, such as Derivative, differentiation, Integral, integration, measure (mathematics), measure, infinite sequences, series (m ...
, in particular, for introducing
mean-periodic function In mathematical analysis, the concept of a mean-periodic function is a generalization of the concept of a periodic function introduced in 1935 by Jean Delsarte. Further results were made by Laurent Schwartz.
Definition
Consider a complex-valued fun ...
s and
generalised shift operators. He was one of the founders of the
Bourbaki group. He was an
invited speaker at the International Congress of Mathematicians
This is a list of International Congresses of Mathematicians Plenary and Invited Speakers. Being invited to talk at an International Congress of Mathematicians has been called "the equivalent, in this community, of an induction to a hall of fame." ...
in 1932 at
Zürich
Zürich () is the list of cities in Switzerland, largest city in Switzerland and the capital of the canton of Zürich. It is located in north-central Switzerland, at the northwestern tip of Lake Zürich. As of January 2020, the municipality has 43 ...
.
Selected publications
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* Application de la théorie des fonctions moyenne-périodiques à la résolution de certaines équations intégrales (1934)
* Application de la théorie des fonctions moyenne-périodiques à la résolution des équations de Fredholm-Nörlund (1935)
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* Fonctions moyenne-périodiques sur un groupe abstrait (1937)
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External links
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1903 births
1968 deaths
People from Fourmies, Nord
20th-century French mathematicians
Nicolas Bourbaki
École Normale Supérieure alumni
Mathematical analysts
Chevaliers of the Légion d'honneur
Commandeurs of the Ordre des Palmes Académiques
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