Results 61 to 70 of about 152,514 (291)
Versatile Palladium‐Catalyzed C‐H Arylation of Fluoroarenes with 2‐Chloropyridine Derivatives
Chemistry – A European Journal, EarlyView.Direct C─H arylation of fluoroarenes with 2‐chloropyridines is enabled by a simple Pd/SPhos system in isopropyl acetate. The method uses inexpensive reactants and shows broad scope and high yields. DFT computations explain reactivity and selectivity.
Federico Belnome +6 more
wiley +1 more source
Bell Numbers of Complete Multipartite Graphs [PDF]
Computer Science Journal of Moldova, 2016 The {\it Stirling number} $S(G;k)$ is the number of partitions of the vertices of a graph $G$ into $k$ nonempty independent sets and the number of all partitions of $G$ is its {\it Bell number}, $B(G)$.
Julian Allagan, Christopher Serkan
doaj
Energies, 2022 This paper presents the design optimization of a heat exchanger for a free-piston Stirling engine (FPSE) through an improved quasi-steady flow (iQSF) model and a central composite design.
Dong-Jun Kim +3 more
doaj +1 more source
Asymptotic Estimates of Stirling Numbers [PDF]
Studies in Applied Mathematics, 1993 New asymptotic estimates are given of the Stirling numbers and , of first and second kind, respectively, as n tends to infinity. The approximations are uniformly valid with respect to the second parameter m.
openaire +2 more sources
Lagrange inversion and Stirling number convolutions [PDF]
, 2014 Recently Agoh and Dilcher proved a convolution identity involving Stirling numbers S(n, r) of the second kind. We prove an identity where S(n, r) is replaced by a more general doubly-indexed family A(n, r).
Chapman, Robin
core
Divisibility by 2 and 3 of certain Stirling numbers
, 2008 The numbers e_p(k,n) defined as min(nu_p(S(k,j)j!): j >= n) appear frequently in algebraic topology. Here S(k,j) is the Stirling number of the second kind, and nu_p(-) the exponent of p. The author and Sun proved that if L is sufficiently large, then e_p(
Davis, Donald M
core +1 more source
Ecography, EarlyView.Correlative species distribution models (SDMs) are quantitative tools in biogeography and macroecology. Building upon the ecological niche concept, they correlate environmental covariates to species presence to model habitat suitability and predict species distributions.
Moritz Klaassen +3 more
wiley +1 more source
A New Symmetric Expression of Weyl Ordering
, 2004 For the creation operator $\adag $ and the annihilation operator $a$ of a harmonic oscillator, we consider Weyl ordering expression of $(\adag a)^n$ and obtain a new symmetric expression of Weyl ordering w.r.t. $\adag a \equiv N$ and $a\adag =N+1$ where $
Green H. S. +7 more
core +1 more source
The Widening Scope of Just Transitions Research: A Review of an Emblematic Concept
Environmental Policy and Governance, EarlyView.ABSTRACT The attention paid to justice dimensions in societal change toward decarbonization and resilience is growing in sustainability governance and research. “Just transition” is emerging as an emblematic concept in these discussions, yet there has been limited systematic stock‐taking of the major strands of research in this area. This paper aims to
Victoria Wibeck +3 more
wiley +1 more source
Computing generating functions of ordered partitions with the transfer-matrix method [PDF]
Discrete Mathematics & Theoretical Computer Science, 2006 An ordered partition of $[n]:=\{1,2,\ldots, n\}$ is a sequence of disjoint and nonempty subsets, called blocks, whose union is $[n]$. The aim of this paper is to compute some generating functions of ordered partitions by the transfer-matrix method.
Masao Ishikawa +2 more
doaj +1 more source