Results 71 to 80 of about 1,801,571 (229)

Global behavior of a third order rational difference equation [PDF]

open access: yesMathematica Bohemica, 2014
In this paper, we determine the forbidden set and give an explicit formula for the solutions of the difference equation $$x_{n+1}=\frac {ax_{n}x_{n-1}}{-bx_{n}+ cx_{n-2}},\quad n\in \mathbb {N}_0 $$ where $a$, $b$, $c$ are positive real numbers and the initial conditions $x_{-2}$, $x_{-1}$, $x_0$ are real numbers. We show that every admissible solution
openaire   +2 more sources

A Finite Difference method for the Wide-Angle `Parabolic' equation in a waveguide with downsloping bottom [PDF]

open access: yes, 2011
We consider the third-order wide-angle `parabolic' equation of underwater acoustics in a cylindrically symmetric fluid medium over a bottom of range-dependent bathymetry.
Antonopoulou, D. C.   +2 more
core   +1 more source

Generalized positive P representation with third-order noise in intracavity coherent photoassociation of Bose-Einstein condensates [PDF]

open access: yes, 2001
We investigate the process of intracavity photoassociation of Bose-Einstein-condensed atoms to form a molecular condensate. As shown previously, this process can only be successfully described by a quantum treatment of all the interacting fields.
Collett, M. J.   +2 more
core   +1 more source

Analysis of Superconductivity in d-p Model on Basis of Perturbation Theory

open access: yes, 2005
We investigate the mass enhancement factor and the superconducting transition temperature in the d-p model for the high-$\Tc$ cuprates. We solve the \'Eliashberg equation using the third-order perturbation theory with respect to the on-site Coulomb ...
Husimi Y.   +9 more
core   +1 more source

Control of signal coherence in parametric frequency mixing with incoherent pumps: narrowband mid-infrared light generation by downconversion of broadband amplified spontaneous emission source at 1550 nm [PDF]

open access: yes, 2012
We study, with numerical simulations using the generalized nonlinear envelope equation, the processes of optical parametric and difference- and sum-frequency generation (SFG) with incoherent pumps in optical media with both quadratic and third-order ...
A. Picozzi   +4 more
core   +3 more sources

Dynamics and behaviors of a third-order system of difference equation

open access: yesMathematical Sciences, 2013
Motivated by an Conjecture in the literature “Dynamics of Second Order Rational Difference Equations with Open Problems and Conjecture”, we introduce a difference equation system:
Wenqiang Ji, Liying Wang, Decun Zhang
openaire   +2 more sources

Two-parametric fractional statistics models for anyons

open access: yes, 2014
In the paper, two-parametric models of fractional statistics are proposed in order to determine the functional form of the distribution function of free anyons.
Rovenchak, Andrij
core   +1 more source

Supraconvergence and Supercloseness of a Discretisation for Elliptic Third-kind Boundary-value Problems on Polygonal Domains [PDF]

open access: yes, 2007
The third-kind boundary-value problem for a second-order elliptic equation on a polygonal domain with variable coefficients, mixed derivatives, and first-order terms is approximated by a linear finite element method with first-order accurate quadrature ...
Emmrich, Etienne
core   +1 more source

Oscillation of nonlinear third order perturbed functional difference equations

open access: yesNonautonomous Dynamical Systems, 2019
This paper deals with oscillatory and asymptotic behavior of all solutions of perturbed nonlinear third order functional difference ...
Dinakar P.   +2 more
doaj   +1 more source

Difference methods of boundary value problems solution for wave equation equipped with fractional time derivative

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2008
Boundary value problems for wave equation with fractional time derivative are studied. А priori estimates for solution of boundary value problems of the first and third kind in differential form are obtained.
A. A. Alikhanov
doaj   +1 more source

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