Results 1 to 10 of about 492 (58)

On the Kontsevich $\star$-product associativity mechanism [PDF]

open access: yes, 2016
The deformation quantization by Kontsevich [arXiv:q-alg/9709040] is a way to construct an associative noncommutative star-product $\star=\times+\hbar \{\ ,\ \}_{P}+\bar{o}(\hbar)$ in the algebra of formal power series in $\hbar$ on a given finite ...
Buring, Ricardo, Kiselev, Arthemy V.
core   +2 more sources

Bounds for partition dimension of M-wheels

open access: yesOpen Physics, 2019
Resolving partition and partition dimension have multipurpose applications in computer, networking, optimization, mastermind games and modelling of chemical substances.
Hussain Zafar   +6 more
doaj   +1 more source

Exponential Operators, Dobinski Relations and Summability [PDF]

open access: yes, 2005
We investigate properties of exponential operators preserving the particle number using combinatorial methods developed in order to solve the boson normal ordering problem.
A Gawron   +10 more
core   +3 more sources

Dobiński relations and ordering of boson operators [PDF]

open access: yes, 2006
We introduce a generalization of the Dobiński relation, through which we define a family of Bell-type numbers and polynomials. Such generalized Dobiński relations are coherent state matrix elements of expressions involving boson ladder operators.
A. Gawron   +21 more
core   +2 more sources

Graph-based analysis of nonreciprocity in coupled-mode systems

open access: yesNew Journal of Physics, 2015
In this work we derive the general conditions for obtaining nonreciprocity in multi-mode parametrically-coupled systems. The results can be applied to a broad variety of optical, microwave, and hybrid systems including recent electro- and opto-mechanical
Leonardo Ranzani, José Aumentado
doaj   +1 more source

Improving environmental change research with systematic techniques for qualitative scenarios

open access: yesEnvironmental Research Letters, 2012
Scenarios are key tools in analyses of global environmental change. Often they consist of quantitative and qualitative components, where the qualitative aspects are expressed in narrative, or storyline, form.
Vanessa Jine Schweizer, Elmar Kriegler
doaj   +1 more source

On right-angled spherical Artin monoid of type Dn

open access: yesOpen Physics, 2018
Recently Berceanu and Iqbal proved that the growth rate of all the spherical Artin monoids is bounded above by 4. In this paper we compute the Hilbert series of the right-angled spherical Artin monoid M(Dn∞)$\begin{array}{} M({D}^{\infty}_{n}) \end{array}
Iqbal Zaffar   +4 more
doaj   +1 more source

All scale-free networks are sparse [PDF]

open access: yes, 2011
We study the realizability of scale free-networks with a given degree sequence, showing that the fraction of realizable sequences undergoes two first-order transitions at the values 0 and 2 of the power-law exponent.
Charo I. Del Genio   +6 more
core   +2 more sources

Computing multiple ABC index and multiple GA index of some grid graphs

open access: yesOpen Physics, 2018
Topological indices are the atomic descriptors that portray the structures of chemical compounds and they help us to anticipate certain physico-compound properties like boiling point, enthalpy of vaporization and steadiness.
Gao Wei   +3 more
doaj   +1 more source

Exact solution of close-packed dimers on the kagome lattice [PDF]

open access: yes, 2007
It is well-known that exact enumerations of close-packed dimers can be carried out for two-dimensional lattices. While details of results are now known for most lattices, due to the unique nature of the lattice structure, there has been no complete ...
Wang, Fa, Wu, F. Y.
core   +1 more source

Home - About - Disclaimer - Privacy