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- Maurice_Kraitchik abstract "Maurice Kraitchik (born April 21, 1882 in Minsk, died Aug. 19, 1957 in Brussels) was a Belgian mathematician and populariser. His main interests were the theory of numbers and recreational mathematics.He is famous for having inspired the two envelopes problem in 1953, with the following puzzle inLa mathématique des jeux: Two people, equally rich, meet to compare the contents of their wallets. Each is ignorant of the contents of the two wallets. The game is as follows: whoever has the least money receives the contents of the wallet of the other (in the case where the amounts are equal, nothing happens). One of the two men can reason: \"Suppose that I have the amount A in my wallet. That's the maximum that I could lose. If I win (probability 0.5), the amount that I'll have in my possession at the end of the game will be more than 2A. Therefore the game is favourable to me.\" The other man can reason in exactly the same way. In fact, by symmetry, the game is fair. Where is the mistake in the reasoning of each man?Kraitchik wrote several books on number theory during 1922-1930 and after the war, and from 1931 to 1939 edited Sphinx, a periodical devoted to recreational mathematics.During World War II, Kraïtchik emigrated to the United States, where he taught a course at the New School for Social Research in New York City on the general topic of \"mathematical recreations.\"Kraïtchik was « agrégé » of the Free University of Brussels, engineer at the “Société Financière de Transports et d'Entreprises Industrielles (Sofina)”, and director of the “Institut des Hautes Etudes de Belgique”.Among his publications were the following: Théorie des Nombres, Paris: Gauthier-Villars, 1922 Recherches sur la théorie des nombres, Paris: Gauthier-Villars, 1924 La mathématique des jeux ou Récréations mathématiques, Paris: Vuibert, 1930, 566 pages Mathematical Recreations, New York: W. W. Norton, 1942 and London: George Allen & Unwin Ltd, 1943, 328 pages (revised edition New York: Dover, 1953) Alignment Charts, New York: Van Nostrand, 1944↑ ↑ ↑".
- Maurice_Kraitchik birthDate "1882".
- Maurice_Kraitchik birthYear "1882".
- Maurice_Kraitchik deathDate "1957".
- Maurice_Kraitchik deathYear "1957".
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- Maurice_Kraitchik wikiPageRevisionID "698144207".
- Maurice_Kraitchik wikiPageWikiLink Belgium.
- Maurice_Kraitchik wikiPageWikiLink Brussels.
- Maurice_Kraitchik wikiPageWikiLink Category:1882_births.
- Maurice_Kraitchik wikiPageWikiLink Category:1957_deaths.
- Maurice_Kraitchik wikiPageWikiLink Category:20th-century_American_mathematicians.
- Maurice_Kraitchik wikiPageWikiLink Category:Belarusian_Jews.
- Maurice_Kraitchik wikiPageWikiLink Category:Belgian_mathematicians.
- Maurice_Kraitchik wikiPageWikiLink Category:Recreational_mathematicians.
- Maurice_Kraitchik wikiPageWikiLink Engineer.
- Maurice_Kraitchik wikiPageWikiLink Free_University_of_Brussels.
- Maurice_Kraitchik wikiPageWikiLink Institut_des_Hautes_Etudes_de_Belgique.
- Maurice_Kraitchik wikiPageWikiLink Mathematician.
- Maurice_Kraitchik wikiPageWikiLink Minsk.
- Maurice_Kraitchik wikiPageWikiLink New_York_City.
- Maurice_Kraitchik wikiPageWikiLink Number_theory.
- Maurice_Kraitchik wikiPageWikiLink Periodical_literature.
- Maurice_Kraitchik wikiPageWikiLink Popular_science.
- Maurice_Kraitchik wikiPageWikiLink Recreational_mathematics.
- Maurice_Kraitchik wikiPageWikiLink Sofina.
- Maurice_Kraitchik wikiPageWikiLink The_New_School.
- Maurice_Kraitchik wikiPageWikiLink Two_envelopes_problem.
- Maurice_Kraitchik wikiPageWikiLink United_States.
- Maurice_Kraitchik wikiPageWikiLinkText "Kraitchik".
- Maurice_Kraitchik wikiPageWikiLinkText "Kraitchik, Maurice".
- Maurice_Kraitchik wikiPageWikiLinkText "Maurice Kraitchik".
- Maurice_Kraitchik dateOfBirth "1882".
- Maurice_Kraitchik dateOfDeath "1957".
- Maurice_Kraitchik name "Kraitchik, Maurice".
- Maurice_Kraitchik shortDescription "Belgian mathematician".
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- Maurice_Kraitchik description "Belgian mathematician".
- Maurice_Kraitchik description "Belgian mathematician".
- Maurice_Kraitchik subject Category:1882_births.
- Maurice_Kraitchik subject Category:1957_deaths.
- Maurice_Kraitchik subject Category:20th-century_American_mathematicians.
- Maurice_Kraitchik subject Category:Belarusian_Jews.
- Maurice_Kraitchik subject Category:Belgian_mathematicians.
- Maurice_Kraitchik subject Category:Recreational_mathematicians.
- Maurice_Kraitchik hypernym Mathematician.
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- Maurice_Kraitchik comment "Maurice Kraitchik (born April 21, 1882 in Minsk, died Aug. 19, 1957 in Brussels) was a Belgian mathematician and populariser. His main interests were the theory of numbers and recreational mathematics.He is famous for having inspired the two envelopes problem in 1953, with the following puzzle inLa mathématique des jeux: Two people, equally rich, meet to compare the contents of their wallets. Each is ignorant of the contents of the two wallets.".
- Maurice_Kraitchik label "Maurice Kraitchik".
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- Maurice_Kraitchik givenName "Maurice".
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- Maurice_Kraitchik name "Kraitchik, Maurice".
- Maurice_Kraitchik name "Maurice Kraitchik".
- Maurice_Kraitchik surname "Kraitchik".