Results 21 to 30 of about 899 (82)

Some identities related to degenerate Stirling numbers of the second kind

open access: yesDemonstratio Mathematica, 2022
The degenerate Stirling numbers of the second kind were introduced as a degenerate version of the ordinary Stirling numbers of the second kind. They appear very frequently when one studies various degenerate versions of some special numbers and ...
Kim Taekyun, Kim Dae San, Kim Hye Kyung
doaj   +1 more source

Flat primes and thin primes [PDF]

open access: yes, 2010
A number is called upper (lower) flat if its shift by +1 ( −1) is a power of 2 times a squarefree number. If the squarefree number is 1 or a single odd prime then the original number is called upper (lower) thin. Upper flat numbers which are primes arise
Broughan, Kevin A., Zhou, Qizhi
core   +2 more sources

The GCD Sequences of the Altered Lucas Sequences

open access: yesAnnales Mathematicae Silesianae, 2020
In this study, we give two sequences {L+n}n≥1 and {L−n}n≥1 derived by altering the Lucas numbers with {±1, ±3}, terms of which are called as altered Lucas numbers.
Koken Fikri
doaj   +1 more source

Compositions of positive integers with 2s and 3s

open access: yesDemonstratio Mathematica, 2023
In this article, we consider compositions of positive integers with 2s and 3s. We see that these compositions lead us to results that involve Padovan numbers, and we give some tiling models of these compositions.
Dişkaya Orhan, Menken Hamza
doaj   +1 more source

Evaluation of integrals with hypergeometric and logarithmic functions

open access: yesOpen Mathematics, 2018
We provide an explicit analytical representation for a number of logarithmic integrals in terms of the Lerch transcendent function and other special functions.
Sofo Anthony
doaj   +1 more source

Representations by degenerate Daehee polynomials

open access: yesOpen Mathematics, 2022
In this paper, we consider the problem of representing any polynomial in terms of the degenerate Daehee polynomials and more generally of the higher-order degenerate Daehee polynomials.
Kim Taekyun   +3 more
doaj   +1 more source

Formal inverses of the generalized Thue-Morse sequences and variations of the Rudin-Shapiro sequence [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2020
A formal inverse of a given automatic sequence (the sequence of coefficients of the composition inverse of its associated formal power series) is also automatic.
Łukasz Merta
doaj   +1 more source

The group inverse of circulant matrices depending on four parameters

open access: yesSpecial Matrices, 2021
Explicit expressions for the coefficients of the group inverse of a circulant matrix depending on four complex parameters are analytically derived. The computation of the entries of the group inverse are now reduced to the evaluation of a polynomial ...
Carmona A.   +3 more
doaj   +1 more source

On sequences without geometric progressions

open access: yes, 2013
An improved upper bound is obtained for the density of sequences of positive integers that contain no k-term geometric progression.Comment: 4 pages; minor ...
Nathanson, Melvyn B., O'Bryant, Kevin
core   +1 more source

The dual of number sequences, Riordan polynomials, and Sheffer polynomials

open access: yesSpecial Matrices, 2021
In this paper we introduce different families of numerical and polynomial sequences by using Riordan pseudo involutions and Sheffer polynomial sequences.
He Tian-Xiao, Ramírez José L.
doaj   +1 more source

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