Results 1 to 10 of about 204 (36)
Fractal-Fractional Mathematical Model Addressing the Situation of Corona Virus in Pakistan [PDF]
Results in Physics, 2020 This work is the consideration of a fractal fractional mathematical model on the transmission and control of corona virus (COVID-19), in which the total population of an infected area is divided into susceptible, infected and recovered classes.
Kamal Shah +5 more
doaj +2 more sources
On a first-order differential system with initial and nonlocal boundary conditions
Demonstratio Mathematica, 2022 This paper is devoted to the existence of solutions and the multiplicity of positive solutions of an initial-boundary value problem for a nonlinear first-order differential system with nonlocal conditions.
Ngoc Le Thi Phuong, Long Nguyen Thanh
doaj +1 more source
Nonlinear Engineering, 2022 This work presents the existential and unique results for the solution to a kind of high-order fractional nonlinear differential equations involving Caputo fractional derivative.
AhmadSoltani Leyla
doaj +1 more source
Open Mathematics, 2022 In this article, we focus on the existence of positive solutions and establish a corresponding iterative scheme for a nonlinear fourth-order equation with indefinite weight and Neumann boundary conditions y(4)(x)+(k1+k2)y″(x)+k1k2y(x)=λh(x)f(y(x)),x∈[0,1]
Wang Jingjing, Gao Chenghua, He Xingyue
doaj +1 more source
Third-order differential equations with three-point boundary conditions
Open Mathematics, 2021 In this paper, a third-order ordinary differential equation coupled to three-point boundary conditions is considered. The related Green’s function changes its sign on the square of definition. Despite this, we are able to deduce the existence of positive
Cabada Alberto, Dimitrov Nikolay D.
doaj +1 more source
Explicit Green functions for spin-orbit Hamiltonians [PDF]
, 2007 We derive explicit expressions for Green functions and some related characteristics of the Rashba and Dresselhaus Hamiltonians with a uniform magnetic field.Comment: 8 ...
Bruening, Jochen +2 more
core +1 more source
Fixed point theory approach to boundary value problems for second-order difference equations on non-uniform lattices [PDF]
, 2014 In this paper, by means of the appropriate Green’s function, an integral representation for the solutions of certain boundary value problems for second-order difference equations on (quadratic andq-quadratic) non-uniform lattices is presented.
Eduardo Godoy, Iván Area, Juan J Nieto
core +1 more source
Nonlinear elastic beam problems with the parameter near resonance
Open Mathematics, 2018 In this paper, we consider the nonlinear fourth order boundary value problem of the ...
Xu Man, Ma Ruyun
doaj +1 more source
Vacuum Energy as Spectral Geometry [PDF]
, 2007 Quantum vacuum energy (Casimir energy) is reviewed for a mathematical audience as a topic in spectral theory. Then some one-dimensional systems are solved exactly, in terms of closed classical paths and periodic orbits. The relations among local spectral
Fulling, Stephen A.
core +6 more sources
Essential closures and AC spectra for reflectionless CMV, Jacobi, and Schrödinger operators revisited [PDF]
, 2008 We provide a concise, yet fairly complete discussion of the concept of essential closures of subsets of the real axis and their intimate connection with the topological support of absolutely continuous measures. As an elementary application of the notion
Gesztesy, Fritz +2 more
core +1 more source