Vocation : Science : Mathematics/ Statistics

Jean Alexandre Eugène Dieudonné (French: [ʒɑ̃ alɛksɑ̃dʁ øʒɛn djødɔne]; 1 July 1906 – 29 November 1992) was a French mathematician, notable for research in abstract algebra, algebraic geometry, and functional analysis, for close involvement with the Nicolas Bourbaki pseudonymous group and the Éléments de géométrie algébrique project of Alexander Grothendieck, and as a historian of mathematics, particularly in the fields of functional analysis and algebraic topology. His work on the classical groups (the book La Géométrie des groupes classiques was published in 1955), and on formal groups, introducing what now are called Dieudonné modules, had a major effect on those fields.
He was born and brought up in Lille, with a formative stay in England where he was introduced to algebra. In 1924 he was admitted to the École Normale Supérieure, where André Weil was a classmate. He began working in complex analysis. In 1934 he was one of the group of normaliens convened by Weil, which would become 'Bourbaki'.

Joseph Rémi Léopold Delbœuf (30 September 1831, Liège, Belgium – 14 August 1896, Bonn, Germany) was a Belgian experimental psychologist who studied visual illusions including his work on the Delboeuf illusion. He studied and taught philosophy, mathematics, and psychophysics. He published works across a diverse range of subjects including the curative effects of hypnotism.

Gustavo Colonnetti (8 November 1886 – 20 March 1968) was an Italian mathematician and engineer who made important contributions to continuum mechanics and strength of materials. He was a Rector of the Politecnico di Torino and President of CNR (Consiglio Nazionale delle Ricerche). His theories found important applications in modern techniques of construction, such as pre-stressed concrete.He is remembered for Colonnetti's theorem (or Colonnetti's minimum principle) which states that in equilibrium the potential energy function W* is minimized.

Jean François Chazy (15 August 1882, Villefranche-sur-Saône – 9 March 1955, Paris) was a French mathematician and astronomer.

Louis Marcel Brillouin (French pronunciation: [lwi maʁsɛl bʁijwɛ̃]; 19 December 1854 – 16 June 1948) was a French physicist and mathematician.
Born in Saint-Martin-lès-Melle, Deux-Sèvres, France, his father was a painter who moved to Paris when Marcel was a boy. There he attended the Lycée Condorcet. The Brillouin family returned to Saint-Martin-lès-Melle during the Franco-Prussian War of 1870 to escape the fighting. There he spent time teaching himself from his grandfather's philosophy books. After the war, he returned to Paris and entered the École Normale Supérieure in 1874 and graduated in 1878. He became a physics assistant to Éleuthère Mascart (his future father-in-law) at the Collège de France, while at the same time working for his doctorates in mathematics and physics, which he gained in 1880 and 1882, respectively. Brillouin then held successive posts as assistant professor of physics at universities in Nancy, Dijon and Toulouse before returning to the École Normale Supérieure in Paris in 1888. Later, he was Professor of Mathematical Physics at the Collège de France from 1900 to retirement in 1931.
In 1911 he was one of only six French physicists invited to the first Solvay Conference. He was awarded the Prix La Caze for 1912.
Brillouin was elected to the Académie des Sciences in 1921. He was an officer of the Legion of Honour.During his career he was the author of over 200 experimental and theoretic papers on a wide range of topics which include the kinetic theory of gases, viscosity, thermodynamics, electricity, and the physics of melting conditions. Most notably he:

built a new model of the Eötvös balance,
wrote on Helmholtz flow and the stability of aircraft,
worked on a theory of the tides.Brillouin died in Paris (16 June 1948). His son Léon Brillouin, also had a prominent career in physics.

Joseph Valentin Boussinesq (pronounced [ʒɔzɛf valɑ̃tɛ̃ businɛsk]; 13 March 1842 – 19 February 1929) was a French mathematician and physicist who made significant contributions to the theory of hydrodynamics, vibration, light, and heat.

Georges Louis Bouligand (13 October 1889 – 12 April 1979) was a French mathematician. He worked in analysis, mechanics, analytical and differential geometry, topology, and mathematical physics. He is known for introducing the concept of paratingent cones and contingent cones.

Marcello Boldrini (9 February 1890, in Matelica – 5 March 1969, in Milan) was an Italian statistician.

Tommaso Boggio (22 December 1877 – 25 May 1963) was an Italian mathematician. Boggio worked in mathematical physics, differential geometry, analysis, and financial mathematics. He was an invited speaker in International Congress of Mathematicians 1908 in Rome. He wrote, with Burali-Forti, Meccanica Razionale, published in 1921 by S. Lattes & Compagnia.