Henry O. Pollak

Henry O. Pollak
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Biographie
Naissance
Nationalité
Formation
Activités
Autres informations
A travaillé pour
Directeur de thèse
Distinction

Henry Otto Pollak (né le à Vienne[1]) est un mathématicien américain.

Carrière

Pollak émigre d'Autriche aux États-Unis en 1934. Il étudie à l'Université Yale (bachelor en 1947[2]) et à l'Université Harvard avec un master en 1948 et un Ph. D. en 1951 sous la direction de Lars Valerian Ahlfors (Some estimates for extremal distances[3]). Il est ensuite chercheur mathématicien aux Laboratoires Bell jusqu'en 1983. Au début des années 1960, il devient directeur du Centre de recherche en mathématiques et statistiques (son successeur est Ronald Graham). De 1983 à 1986, il a été vice-président adjoint de Bell Communications Research.

À partir de 1987, il est professeur invité à l'Université Columbia dans la cadre de la formation des enseignants (Teachers College). Il faisait partie du School Mathematics Study Group (SMSG) depuis 1958 et était président de son conseil consultatif en 1963-64.

Recherche

Pollak a fait des recherches en théorie des fonctions, en mathématiques discrètes (théorie de l'information, problème de Steiner dans différentes topologies, problème de plus courts chemins dans des réseaux, problème avec des bandes passantes limitées dans la transmission du signal), en statistique et en théorie des probabilités et aussi en pédagogie des mathématiques. Interrogé sur la différence entre le travail d'un mathématicien à l'université et dans l'industrie, il a déclaré dans une interview en 1984 que la différence ne réside pas tant dans la nature de l'enseignement, mais que dans l'industrie on avait généralement affaire à des étudiants qui étaient désireux apprendre[4]. Pollak détient un brevet sur les Interconnected Loop Digital Transmission Systems (systèmes de transmission numérique en boucle interconnectée).

Prix et distinctions

Bibliographie

  • Henry O. Pollak, « Solving problems in the real world », dans Lynn Arthur Steen (éd.) Why numbers count, College Entrance Examination Board, New York, 1997
  • Henry O. Pollak, « Mathematical Modeling and Discrete Mathematics », dans Joseph G. Rosenstein, Deborah S. Franzblau et Fred S. Roberts (éditeurs), Discrete Mathematics in the Schools, American Mathematical Society, coll. « DIMACS Series in Discrete Mathematics and Theoretical Computer Science » (no 36), (ISBN 978-0-8218-1137-5 et 978-1-4704-3994-1, DOI 10.1090/dimacs/036), p. 99-104
  • Donald Albers et Gerald L. Alexanderson, Mathematical People : Profiles and Interviews, A K Peters/CRC Press, , 2e éd., 416 p. (ISBN 9780367386870).
  • Henry O. Pollak, « Some remarks on the Steiner problem », Journal of Combinatorial Theory, Series A, vol. 24, no 3,‎ , p. 278–295 (DOI 10.1016/0097-3165(78)90058-4, lire en ligne)

Notes et références

  1. Données biographiques d'après American Men and Women of Science, Thomson Gale 2004.
  2. La même année il participe à la William Lowell Putnam Competition et gagne une seconde place avec l'équipe de Yale, avec Murray Gerstenhaber et Murray Gell-Mann.
  3. Mathematics Genealogy Project.
  4. Pollak in Albers, Alexanderson Mathematical People : « The big difference between industry and university is not whether or not you teach. The difference is that in industry you typically have more students who want to learn ».
  5. MAA presidents: Henry Otto Pollak

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