Jacques Le Pailleur

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Jacques Le Pailleur (* before 1623; † November 4, 1654 in Paris ) was a French mathematician, financier and poet.

He was the son of a Lieutenant d'Election in Meulan-en-Yvelines and is portrayed in the history work Historiettes by Gédéon Tallemant des Réaux , with whom he was friends. He was temporarily employed by a savings bank and quit because he did not want to support the embezzlement observed there. He was then in the service of President Larcher, who was related to him. He also enjoyed himself at festivals, danced and composed as part of a circle of poets and bon vivants , to which the poet Charles de Vion d'Alibray also belonged. In 1623 he was involved with the doctor Etienne Chaumean in a joke by his friends that startled the Parisians and led to serious investigations by official bodies: everywhere in Paris there were posters of a society of Rosicrucians who stated that they could cure all kinds of diseases and were invisible be. Tired of the pleasures in Paris and since the ground was getting too hot for him because of the Rosicrucian Affair, he went to Brittany in 1623 with the Count of Saint-Brisse, a cousin of Cardinal Retz , to see the governor, Marshal Pons de Lauzières , Marquis de Thémines , whose finances he managed as general manager until the death of Pons de Lauzières-Thémines in 1652. As a financier, he had a reputation for righteousness and conscientiousness.

He was the teacher of Marie-Madeleine de La Fayette and was also known to their parents. He was also a friend of Étienne Pascal , the father of Blaise Pascal . When Etienne Pascal discovered the mathematical genius of his son in 1635, who proved the 32nd theorem of the elements of Euclid without instruction , his first path led him to his friend Le Pailleur to share his joy with him. With both Pascals he was a member of the circle around Marin Mersenne in Paris (from around 1637), where he was able to pursue his mathematical inclinations, which had existed since his youth. After the death of Mersenne in 1648, Le Pailleur took over the leadership of the group of mathematicians who formed a kind of academy (Academie Parisienne called, also Academie Le Pailleur). Participants included Pierre Gassendi , Gilles Personne de Roberval , the Pascals, Pierre de Carcavi , Girard Desargues , Ismael Boulliau and Claude Mylon (their secretary). Here Pascal presented his experimental results on air pressure and vacuum (discussion with the Jesuit Étienne Noël , to which Pascal declared himself in a letter to Le Pailleur in 1648) and in 1654 his mathematical discoveries.

literature

  • Tallement des Réaux: Historiettes
  • Didier Kahn The rosicrucian hoax in France (1623–1624) , in: Anthony Grafton, William Newman (ed.) Secrets of Nature , MIT Press 2001 (according to Kahn, Le Pailleur's participation in the Rosicrucian joke results from the papers of John Locke , to whom Le Pailleur later confided the story as an anecdote)

Individual evidence

  1. Blaise Pascal: Small writings on religion and philosophy. Translated by Ulrich Kunzmann, Meiner, Hamburg 2006, ISBN 978-3787317691 , p. 4.