Victor Thébault

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Victor Michael Jean-Marie Thébault (1882–1960) was a French mathematician best known for propounding three problems in geometry. Thébault's theorem is used in some references to refer to the first of these problems, in other references to the third.

France Republic with mainland in Europe and numerous oversea territories

France, officially the French Republic, is a country whose territory consists of metropolitan France in Western Europe and several overseas regions and territories. The metropolitan area of France extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. It is bordered by Belgium, Luxembourg and Germany to the northeast, Switzerland and Italy to the east, and Andorra and Spain to the south. The overseas territories include French Guiana in South America and several islands in the Atlantic, Pacific and Indian oceans. The country's 18 integral regions span a combined area of 643,801 square kilometres (248,573 sq mi) and a total population of 67.3 million. France, a sovereign state, is a unitary semi-presidential republic with its capital in Paris, the country's largest city and main cultural and commercial centre. Other major urban areas include Lyon, Marseille, Toulouse, Bordeaux, Lille and Nice.

Mathematician person with an extensive knowledge of mathematics

A mathematician is someone who uses an extensive knowledge of mathematics in his or her work, typically to solve mathematical problems.

Geometry branch of mathematics that measures the shape, size and position of objects

Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space. A mathematician who works in the field of geometry is called a geometer.

Thébault was born on March 6, 1882 in Ambrières-les-Grand (today a part of Ambrières-les-Vallées, Mayenne) in the northwest of France. He got his education at a teacher's college in Laval, where he studied from 1898 to 1901. After his graduation he taught for three years at Pré-en-Pail until he got a professorship at technical school in Ernée. In 1909 he placed first in a competitive exams, which yielded him a certificate to work as a science professor at teachers' colleges. Thébault however found a professor's salary insufficient to support his large family and hence he left teaching to become a factory superintendent at Ernée from 1910 to 1923. In 1924 he became a chief insurance inspector in Le Mans, a position he held until his retirement in 1940. During his retirement he lived in Tennie. He died on March 19, 1960 shortly after a severe stroke and was survived by his wife, five sons and a daughter. [1]

Ambrières-les-Vallées Commune in Pays de la Loire, France

Ambrières-les-Vallées is a commune in the Mayenne department in northwestern France. It is on the border of Normandy.

Mayenne Department of France

Mayenne is a department in northwest France named after the Mayenne River. Mayenne is part of the current region of Pays de la Loire and is surrounded by the departments of Manche, Orne, Sarthe, Maine-et-Loire, and Ille-et-Vilaine.

Laval, Mayenne Prefecture and commune in Pays de la Loire, France

Laval is a town in western France, about 300 km (190 mi) west-southwest of Paris, and the capital of the Mayenne department. Laval was before the French Revolution part of the province of Maine, now split between two departments, Mayenne and Sarthe. Its inhabitants are called Lavallois. The commune of Laval proper, without the metropolitan area, is the 13th most populous in northwestern France and the 119th in France.

Despite leaving teaching Thébault stayed active in mathematics with number theory and geometry being his main areas of interest. He published a large number of articles in math journals all over the world and aside from regular articles he also contributed many original problems and solutions to their problem sections. He published over 1000 original problems in various mathematical magazines [2] and his contributions to the problem section of the American Mathematical Monthly alone comprise over 600 problems and solutions. In recognition of his contributions the French government bestowed two titles on him. In 1932 he became an Officier de L'Instruction Publique and in a 1935 a Chevalier de l'Order de Couronne de Belgium. [1]

<i>American Mathematical Monthly</i> journal

The American Mathematical Monthly is a mathematical journal founded by Benjamin Finkel in 1894. It is published ten times each year by Taylor & Francis for the Mathematical Association of America.


  1. 1 2 C. W. Trigg: Victor Thebault 1882-1960. Mathematics Magazine, Vol. 33, No. 5 (May - Jun., 1960) (JSTOR)
  2. Alexander Ostermann, Gerhard Wanner: Geometry by Its History. Springer, 2012, p. 181

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