Blossoming and Hermite-Padé approximation for hypergeometric series

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Abstract

Based on the blossoming theory, in this work we develop a new method for deriving Hermite-Padé approximants of certain hypergeometric series. Its general principle consists in building identities generalising the Hermite identity for exponentials, and in then applying their blossomed versions to appropriate tuples to simultaneously produce explicit expressions of the approximants and explicit integral representations of the corresponding remainders. For binomial series we use classical blossoms while for q-hypergeometric series we have to use q-blossoms.

Original languageEnglish
Pages (from-to)1183-1214
Number of pages32
JournalNumerical Algorithms
Volume88
Issue number3
DOIs
StatePublished - Nov 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.

Keywords

  • Blossoms
  • Hermite identity
  • Hermite-Padé approximation
  • Hypergeometric series
  • Rational approximation
  • q-Blossoms

ASJC Scopus subject areas

  • Applied Mathematics

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