Results 81 to 90 of about 13,879,845 (281)
Positive Solution of a Nonlinear Fractional Differential Equation Involving Caputo Derivative
, 2012 This paper is concerned with a nonlinear fractional differential equation involving Caputo derivative. By constructing the upper and lower control functions of the nonlinear term without any monotone requirement and applying the method of upper and lower
Changyou Wang, Haiqiang Zhang, Shu Wang
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Criteria for the existence of positive solutions to delayed functional differential equations
Electronic Journal of Qualitative Theory of Differential Equations, 2016 The paper is concerned with the large time behavior of solutions to functional delayed differential equations $\dot y(t)=f(t,y_t)$ where $f\colon \Omega_n \mapsto {\mathbb{R}}^n$ is a continuous map satisfying a local Lipschitz condition with respect to ...
Josef Diblik
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Stability of stationary solutions in models of the Calvin cycle [PDF]
arXiv, 2016 In this paper results are obtained concerning the number of positive stationary solutions in simple models of the Calvin cycle of photosynthesis and the stability of these solutions. It is proved that there are open sets of parameters in a model of Zhu et. al. for which there exist two positive stationary solutions.
arxiv
Positive solutions for multipoint boundary-value problem with parameters
Electronic Journal of Differential Equations, 2008 In this paper, we study a generalized Sturm-Liouville boundary-value problems with two positive parameters. By constructing a completely continuous operator and combining fixed point index theorem and some properties of the eigenvalues of linear ...
Zhongli Wei, Juanjuan Xu
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Electronic Journal of Qualitative Theory of Differential Equations, 2015 The paper deals with the existence and multiplicity of positive solutions for a system of higher-order singular nonlinear fractional differential equations with nonlocal boundary conditions.
Shengli Xie
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, 2011 The method of upper and lower solutions and the Schauder fixed point theorem are used to investigate the existence and uniqueness of a positive solution to a singular boundary value problem for a class of nonlinear fractional differential equations with ...
Changyou Wang +3 more
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Electronic Journal of Qualitative Theory of Differential Equations, 2015 In this paper, we give the exact asymptotic behavior of the unique positive solution to the following singular boundary value problem \begin{equation*} \begin{cases} -\frac{1}{A}(Au^{\prime })^{\prime }=p(x)g(u),\quad x\in (0,1), \\ u>0,\quad \text{in ...
Imed Bachar, Habib Maagli
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Nonexistence of positive solution for an integral equation on a Half-Space R+n
, 2011 Let $n, m$ be a positive integer and let $R_+^n$ be the $n$-dimensional upper half Euclidean space. In this paper, we study the following integral equation \begin{eqnarray} u(x)=\int_{R_+^n}G(x,y)u^pdy, \end{eqnarray} where \begin{eqnarray*} G(x ...
Yanqin Fang, Jihui Zhang
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Positive solutions of a boundary value problem with integral boundary conditions
Electronic Journal of Differential Equations, 2011 We consider boundary-value problems studied in a recent paper. We show that some existing theory developed by Webb and Infante applies to this problem and we use the known theory to show how to find improved estimates on parameters $mu^*, lambda ...
Jeff R. L. Webb
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Electronic Journal of Qualitative Theory of Differential Equations, 2018 We study the classification and evolution of bifurcation curves of positive solutions for the one-dimensional Neumann–Robin boundary value problem \begin{equation*} \begin{cases} u^{\prime \prime }(x)+\lambda f(u(x))=0,\quad 00$ is an evolution parameter,
Chi-Chao Tsai +2 more
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