Results 21 to 30 of about 2,633 (260)

Representations of Stirling Numbers of the First Kind by Multiple Integrals

open access: yesIntegers, 2015
See the abstract in the attached pdf.
Takashi Agoh, Karl Dilcher
openaire   +3 more sources

A Note on Some Identities of New Type Degenerate Bell Polynomials

open access: yesMathematics, 2019
Recently, the partially degenerate Bell polynomials and numbers, which are a degenerate version of Bell polynomials and numbers, were introduced.
Taekyun Kim   +3 more
doaj   +1 more source

Refinements of the Bell and Stirling numbers [PDF]

open access: yesTransactions on Combinatorics, 2018
‎‎We introduce new refinements of the Bell‎, ‎factorial‎, ‎and unsigned Stirling numbers of the first and second kind that unite the derangement‎, ‎involution‎, ‎associated factorial‎, ‎associated Bell‎, ‎incomplete Stirling‎, ‎restricted factorial ...
Tanay Wakhare
doaj   +1 more source

Closed Form Expressions for the Stirling Numbers of the First Kind

open access: yesIntegers, 2017
See the abstract in the attached pdf.
José A. Adell, Alberto Lekuona
openaire   +4 more sources

Asymptotic expansions for the stirling numbers of the first kind

open access: yesJournal of Combinatorial Theory, Series A, 1995
Let \(s(n, m)\) denote the unsigned Stirling numbers of the first kind. For any \(\eta> 0\) and natural number \(v\), the following asymptotic formula holds uniformly \[ {s(n, m)\over n!}= {1\over n} \sum_{0\leq k\leq v} {\Pi_{m,k} (\log n)\over n^k}+ O \Biggl({(\log n)^m\over m!n^{v+ 2}}\Biggr) \] for \(1\leq m\leq \eta\log n\), where \(\Pi_{m, k}(x)\)
openaire   +1 more source

A Symmetric Sum Involving the Stirling Numbers of the First Kind

open access: yesEuropean Journal of Combinatorics, 1984
Let \(\{a_i\}^n_{i=1}\) be a sequence of natural numbers, \(0\leq a_i\leq n\) for \(i=1,\dots,n\), and \(A_{nm}\) be an \(n\times m\) array associated with this sequence, whose entries \(\alpha_{ij}=0,1\) such that \(\sum_{j=1}^m \alpha_{ij}=a_i\), \(i=1,\dots,n\), \(j=1,\dots,m\).
A. M. Khidr, B. S. El-Desouky
openaire   +1 more source

Explicit upper bounds for the Stirling numbers of the first kind

open access: yesJournal of Combinatorial Theory, Series A, 2022
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +4 more sources

The asymptotic behavior of the stirling numbers of the first kind

open access: yesJournal of Combinatorial Theory, Series A, 1993
The asymptotic expansion for the Stirling number of the first kind \({n \brack k}\) for fixed \(k\) together with examples has been obtained.
openaire   +1 more source

Sum rules for permutations with fixed points involving Stirling numbers of the first kind

open access: yesIndonesian Journal of Combinatorics
We propose sum rules for permutations pn(k) of the ensemble {1,2,...,n} with k fixed points, in the form of partial sums of their moments. The corresponding identities involve Stirling numbers of the first kind s(q,r).
Jean-Christophe Pain
doaj   +1 more source

Electroactive 3D Porous Graphene Foam Impedimetric Biosensor for Ultrasensitive Detection of MCF‐7‐Cells‐Derived Extracellular Vesicles in Human Serum

open access: yesAdvanced Materials Technologies, EarlyView.
A label‐free impedimetric biosensor based on electroactive 3D porous graphene foam enables ultrasensitive and selective detection of CD81 protein and MCF‐7 cell‐derived extracellular vesicles in human serum. Detection limits of 0.048 fg/mL for CD81 and ∼24 EVs/mL are achieved, demonstrating a robust platform for selective, label‐free, and ...
Michael Robert Furness   +11 more
wiley   +1 more source

Home - About - Disclaimer - Privacy