Results 11 to 20 of about 293 (217)

A Faster and More Accurate Algorithm for Calculating Population Genetics Statistics Requiring Sums of Stirling Numbers of the First Kind

open access: yesG3: Genes, Genomes, Genetics, 2020
Ewen’s sampling formula is a foundational theoretical result that connects probability and number theory with molecular genetics and molecular evolution; it was the analytical result required for testing the neutral theory of evolution, and has since ...
Swaine L. Chen, Nico M. Temme
doaj   +1 more source

Stirling Numbers of Uniform Trees and Related Computational Experiments

open access: yesAlgorithms, 2023
The Stirling numbers for graphs provide a combinatorial interpretation of the number of cycle covers in a given graph. The problem of generating all cycle covers or enumerating these quantities on general graphs is computationally intractable, but recent
Amir Barghi, Daryl DeFord
doaj   +1 more source

Stirling numbers and periodic points [PDF]

open access: yesActa Arithmetica, 2021
We introduce the notion of almost realizability, an arithmetic generalization of realizability for integer sequences, which is the property of counting periodic points for some map. We characterize the intersection between the set of Stirling sequences (of both the first and the second kind) and the set of almost realizable sequences.
Miska P, Ward T
openaire   +5 more sources

The Relation between the Probability of Collision-Free Broadcast Transmission in a Wireless Network and the Stirling Number of the Second Kind

open access: yesMathematics, 2018
The broadcast performance of the 802.11 wireless protocol depends on several factors. One of the important factor is the number of nodes simultaneously contending for the shared channel.
Prakash Veeraraghavan Golnar Khomami   +2 more
doaj   +1 more source

Effects of different working gases on the heat transfer enhancement performance of a heating tube with spiral insert under oscillatory flow

open access: yesEnergy Reports, 2023
The working gas type had an important effect on the heat transfer performance of the turbulence device in the heater of Stirling engine, but the related researches were scarce, especially under the oscillatory flow.
Feng Xin   +4 more
doaj   +1 more source

Dirichlet series and series with Stirling numbers

open access: yesCubo, 2023
This paper presents a number of identities for Dirichlet series and series with Stirling numbers of the first kind. As coefficients for the Dirichlet series we use Cauchy numbers of the first and second kinds, hyperharmonic numbers, derangement numbers ...
Khristo Boyadzhiev
doaj   +1 more source

Oscillatory heat transfer correlation for annular mini channel stirling heater

open access: yesCase Studies in Thermal Engineering, 2020
Annular mini-channel Stirling heater are replacing conventional tubular heater in modern free piston Stirling engines due to reliability and manufacturing issues.
Umair Munir   +4 more
doaj   +1 more source

Numerical simulation of stages number influence to the characteristics of a looped tube thermoacoustic Stirling engine [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Физика, 2021
Background and Objectives: The traveling wave thermoacoustic engine is a variation of the Stirling engine family. With an increase in the number of stages of a traveling wave thermoacoustic engine from one to four, an improvement in the characteristics ...
Gorshkov, Ilya Borisovich   +1 more
doaj   +1 more source

Congruences for the Stirling numbers and associated Stirling numbers [PDF]

open access: yesActa Arithmetica, 1990
Let s(n,k) and S(n,k) be the Stirling numbers of the first and second kind, respectively. The author proves that if \(k+n\) is odd, then \[ s(n,k)\equiv 0 (mod\left( \begin{matrix} n\\ 2\end{matrix} \right)),\quad S(n,k)\equiv 0 (mod\left( \begin{matrix} k+1\\ 2\end{matrix} \right)).
openaire   +2 more sources

Stirling numbers revisited

open access: yesDiscrete Mathematics, 1998
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Raymond Scurr, Gloria Olive
openaire   +1 more source

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