Sequence Characterizations of Double Riordan Arrays and Their Compressions

Research output: Journal ArticleArticlepeer-review

Abstract

Inspired by the Fibonacci tree shown in the recent book, Catalan Numbers, by Richard Stanley, we present a combinatorial way to construct double Riordan arrays by using ECO technique. The sequence characterizations of double Riordan arrays and subgroups of the double Riordan group are found. As an extension of Pascal–Fibonacci triangle, the compression forms of double Riordan arrays called double quasi-Riordan arrays are defined. The connections of lower triangular matrices and double Riordan arrays as well as their compressions are given. Those results are also extended to the case of high order Riordan arrays, which are defined in the paper. The pairs of Sheffer polynomials and pairs of summation formulas associated with double Riordan arrays are defined and discussed.
Original languageAmerican English
JournalLinear Algebra and Its Applications
Volume549
DOIs
StatePublished - Jul 15 2018

Keywords

  • Double Riordan arrays
  • Riordan group
  • Generating function
  • Succession rule
  • A-sequence
  • Z-sequence
  • High order Riordan arrays
  • Quasi-Riordan arrays

Disciplines

  • Physical Sciences and Mathematics
  • Applied Mathematics
  • Mathematics

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