Results 41 to 50 of about 175 (58)

Homoclinic solutions in periodic partial difference equations

open access: yesAdvances in Nonlinear Analysis
By using critical point theory in combination with periodic approximations, we obtain novel sufficient conditions for the existence of nontrivial homoclinic solutions for a class of periodic partial difference equations with sign-changing mixed ...
Mei Peng, Zhou Zhan, Yu Jianshe
doaj   +1 more source

Hirota equation and the quantum plane

open access: yes, 2012
We discuss geometric integrability of Hirota's discrete KP equation in the framework of projective geometry over division rings using the recently introduced notion of Desargues maps.
Doliwa, Adam
core   +1 more source

Mathematical Structure of Loop Quantum Cosmology: Homogeneous Models [PDF]

open access: yes, 2013
The mathematical structure of homogeneous loop quantum cosmology is analyzed, starting with and taking into account the general classification of homogeneous connections not restricted to be Abelian.
Bojowald, Martin
core   +3 more sources

Percival Lagrangian approach to Aubry-Mather theory [PDF]

open access: yes, 2011
We present some streamlined proofs of some of the basic results in Aubry-Mather theory (existence of quasi-periodic minimizers, multiplicity results when there are gaps among minimizers) based on the study of hull functions.
De La Llave, Rafael, Xifeng Su
core  

Linear partial divided-difference equation satisfied by multivariate orthogonal polynomials on quadratic lattices

open access: yes, 2016
In this paper, a fourth-order partial divided-difference equation on quadratic lattices with polynomial coefficients satisfied by bivariate Racah polynomials is presented.
Area, I.   +4 more
core   +1 more source

Lattice equations arising from discrete Painlev\'e systems. II. $A_4^{(1)}$ case

open access: yes, 2016
In this paper, we construct two lattices from the $\tau$ functions of $A_4^{(1)}$-surface $q$-Painlev\'e equations, on which quad-equations of ABS type appear.
Joshi, Nalini   +2 more
core   +1 more source

An efficient nonstandard computer method to solve a compartmental epidemiological model for COVID-19 with vaccination and population migration. [PDF]

open access: yesComput Methods Programs Biomed, 2022
Herrera-Serrano JE   +3 more
europepmc   +1 more source

On a class of nonlinear discrete problems of Kirchhoff type [PDF]

open access: yes
In view of variational methods and critical points theory, we study the existence of solutions for a discrete boundary value problem, which is a discrete variant of a continuous (p1(x), p2(x))-Kirchhoff-type problem, with a real parameter λ > 0 ...
AYOUJIL, Abdesslem   +2 more
core   +2 more sources

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