André Sainte-Laguë

André Sainte- Laguë ( [ ɑdʀe sɛtlaɡy ]; born April 20, 1882 in Saint -Martin- Curton; † January 18, 1950 ) was a French mathematician, pioneer in graph theory and mathematics professor at the Conservatoire National des Arts et Métiers in Paris.

Sainte- Laguë studied at the Ecole Normale Superieure (ENS ). He was then a teacher in the province and in Paris. During the First World War, he was wounded three times ( he was awarded the Croix de Guerre ) and worked from 1917 to 1919 in the laboratory of the ENS in issues of ballistics and it inspired the flight of birds. He may be the actual model of the myth of the scientist who should have shown that bumblebees can not fly. Sainte- Laguë showed that in a rough calculation, assuming a flat, smooth wing, but he knew himself that his assumptions were not met.

After the First World War, he was again a high school teacher in Paris and incidentally Maitre de Conferences at the Conservatoire National des Arts et Métiers, where he was Professor of Applied Mathematics in 1938 and devoted himself to the training of engineers. He also organized the math section of the museum Palais de la Découverte.

He was an active union member of the Confédération des travailleurs intellectuels, which he was president in 1929. During World War II he was in the Resistance and temporarily detained. He received the Medal of the Resistance and was an officer of the Legion of Honour. He was in the Council ( Conseil général) of the Banque de France.

He wrote in 1926 before Dénes Kőnig the first book on graph theory (Les réseaux (ou graphes ) ). He has also written several popular science books.

According to him a seat distribution method is called, the Sainte- Laguë method, which he published in 1910.

Writings

  • Les réseaux (ou graphes ). Gauthier -Villars, Paris 1926
  • Géométrie et jeux de situation. Gauthier -Villars, Paris 1929
  • Avec des nombres et des lignes. Vuiberg, Paris 1937
  • You connu à l' inconnu. Gallimard, Paris 1941
  • Le monde des formes. Fayard, Paris 1948
  • De l' homme au robot. Fayard, Paris 1953
  • L' use Secure Pratique des Mathématiques. Eyrolles, Paris 1949
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