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  1. Home > Articles & Issues >
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  3. Integrality of hook ...
Conference paper

Integrality of hook ratios

Paul-Olivier Dehaye ORCID (1)
(1) Department of Mathematics - ETH
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Imported on
January 31, 2017
Published on
December 31, 2011
Last modified on
March 31, 2025
Volume
DMTCS Proceedings vol. AR, 24th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2012)
Proceedings
DOI
10.46298/dmtcs.3022
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https://about.hal.science/hal-authorisation-v1
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Integrality of hook ratios

Paul-Olivier Dehaye ORCID (1)
(1) Department of Mathematics - ETH
Abstract
English
We study integral ratios of hook products of quotient partitions. This question is motivated by an analogous question in number theory concerning integral factorial ratios. We prove an analogue of a theorem of Landau that already applied in the factorial case. Under the additional condition that the ratio has one more factor on the denominator than the numerator, we provide a complete classification. Ultimately this relies on Kneser's theorem in additive combinatorics.
French
Nous étudions les fractions de produits d'équerres de partitions quotients. Cette question fait écho à une question en théorie des nombres sur les quotients entiers de factorielles. Nous prouvons un analogue du théorème de Landau, qui aidait déjà dans le cas des factorielles. Sous l'hypothèse supplémentaire d'une fraction avec un facteur de plus au dénominateur qu'au numérateur, nous obtenons une classification complète. Cette partie de la preuve repose sur un théorème de Kneser en combinatoire additive.
Keywords
  • [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM]
  • partitions
  • hook products
  • Kneser's theorem
  • McKay numbers
  • Beurling-Nyman criterion
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