Results 1 to 10 of about 228 (55)
Fractal-Fractional Mathematical Model Addressing the Situation of Corona Virus in Pakistan. [PDF]
Results Phys, 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.
Shah K +5 more
europepmc +2 more sources
Demonstratio Mathematica, 2019 In this paper, existence and uniqueness of solution for a coupled impulsive Hilfer–Hadamard type fractional differential system are obtained by using Kransnoselskii’s fixed point theorem.
Manzoor Ahmad, Akbar Zada, Jehad Alzabut
exaly +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
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
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
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
Triple positive solutions for second-order four-point boundary value problem with sign changing nonlinearities [PDF]
, 2009 In this paper, we study the existence of triple positive solutions for second-order four-point boundary value problem with sign changing nonlinearities. We first study the associated Green's function and obtain some useful properties.
Bai, Chuanzhi, Liu, Yang, Xie, Dapeng
core +7 more sources
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
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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
Asymptotic entropy and green speed for random walks on countable groups [PDF]
, 2007 We study asymptotic properties of the Green metric associated with transient random walks on countable groups. We prove that the rate of escape of the random walk computed in the Green metric equals its asymptotic entropy.
Blachère, Sébastien +2 more
core +8 more sources