Results 231 to 240 of about 524,417 (274)

Positive Periodic Solutions of Coupled Singular Rayleigh Systems

Qualitative Theory of Dynamical Systems, 2020
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Kong, Fanchao, Liang, Feng, Nieto, Juan J.   +2 more
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Positive periodic solutions of delayed periodic Lotka–Volterra systems

Physics Letters A, 2005
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Lin, Wei, Chen, Tianping
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Positive solutions for sublinear periodic parabolic problems

Nonlinear Analysis: Theory, Methods & Applications, 2003
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Godoy, T., Kaufmann, U., Paczka, S.
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Positive solutions for nonlinear periodic problems

Positivity, 2008
The paper studies the existence of positive solutions for the following nonlinear periodic problem with a nonsmooth potential \[ -(|x'(t)|^{p-2}x'(t))'\in \partial j(t,x(t))\quad \text{a.e. on} \;[0,b], \tag{1} \] \[ x(0)=x(b),\quad x'(0)=x'(b). \tag{2} \] Here \(b>0\), \(p>1\). In this problem the potential function \(j(t,x)\) is jointly measurable, \(
Filippakis, Michael, Papageorgiou, Nikolaos, Staicu, Vasile   +2 more
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THREE POSITIVE PERIODIC SOLUTIONS OF NONLINEAR DIFFERENTIAL EQUATIONS WITH PERIODIC COEFFICIENTS

Analysis and Applications, 2005
We establish the existence of at least three positive periodic solutions to the second order differential equation with periodic coefficients [Formula: see text] where f is continuous with f(t + T, x) = f(t,x) for (t,x) ∊ R × R and T > 0, p, q are continuous and T-periodic with p > 0 and q ≥ 0.
Liu, Yuji, Ge, Weiguo, Gui, Zhanji
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Positive periodic solutions of neutral Lotka–Volterra system with periodic delays

Applied Mathematics and Computation, 2004
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Yang, Zhihui, Cao, Jinde
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Positive periodic solutions of delayed differential equations

Applied Mathematics and Computation, 2011
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Yang, Bianxia, Ma, Ruyun, Gao, Chenghua
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Positive periodic solutions of nonlinear differential equations

Applied Mathematics-A Journal of Chinese Universities, 2003
The authors prove the existence of at least two positive periodic solutions for a first-order scalar differential equation whose nonlinearity presents some kind of oscillating behaviour.
Liu, Yuji, Ge, Weigao
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Multiple positive solutions for nonlinear periodic problems

Nonlinear Analysis: Theory, Methods & Applications, 2010
The authors discuss the existence and the multiplicity of positive solutions to the following \(p\)-Laplacian periodic problem: \[ \begin{cases} -(| x'(t)|^{p-2}x'(t))'=f(t,x(t)), \quad ...
Hu, Shouchuan, Papageorgiou, Nikolas S.
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Existence of positive periodic solutions for a periodic logistic equation

Applied Mathematics and Computation, 2003
The paper deals with existence of \(\omega\)-periodic solutions for the following generalized logistic equations: \[ x'(t)=\pm x(t)\left[f\left(t, \int_{-r(t)}^{-\sigma(t)}x(t+s) d\mu(t,s)\right)-g(t, x(t-\tau(t, x(t))))\right], \] where \(\sigma,r\in C(\mathbb{R},(0,\infty))\) are \(\omega\)-periodic functions with \(\sigma(t)
Fan, Guihong, Li, Yongkun
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