THREE POSITIVE PERIODIC SOLUTIONS OF NONLINEAR DIFFERENTIAL EQUATIONS WITH PERIODIC COEFFICIENTS
Analysis and Applications, 2005We 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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Existence of positive almost periodic solutions to the hematopoiesis model
Applied Mathematics and Computation, 2016zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Toka Diagana, Hui Zhou 0001
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Existence and global stability of positive periodic solution of periodic integrodifferential systems with feedback controls [PDF]
Computers and Mathematics With Applications, 2000 Sufficient conditions are obtained for the existence and global stability of a positive periodic solution in some periodic integrodifferential systems with feedback controls by using the technique of coincidence degree and Lyapunov ...
Weng, Peixuan
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Positive periodic solutions of first-order singular systems
Applied Mathematics and Computation, 2012This paper deals with existence and the number of periodic solutions of the first order system \[ u'_i(t)=-a_i(t)u_i(t)+\lambda b_i(t)f_i(\vec u(t)),\quad i=1,\,\dots,\,n\eqno(1) \] where \(\vec u=(u_1,\,\dots,\,u_n)\in{\mathbb R}^n\), \(a_i\) and \(b_i\) are continuous \(T\)-periodic functions with positive mean value in a period, \(f_i: {\mathbb R}^n\
Ruipeng Chen, Ruyun Ma, Zhiqian He
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Positive periodic solutions for a class of delay differential equations
Applied Mathematics and Computation, 2011zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhijie Nan, Weijun Chen, Lin Li
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Asymptotic Profiles for Positive Solutions in Periodic-Parabolic Problem
Journal of Dynamics and Differential Equations, 2022zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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On Positive Periodic Solutions to Impulsive Differential Equations with Delays
Results in Mathematics, 2004zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Li, Jianli, Shen, Jianhua
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Positive periodic solutions for neutral functional differential equations
Applied Mathematics Letters, 2020The present paper applies a fixed point theorem in the cone and some new analysis techniques to establish some sufficient conditions which guarantee the existence of positive periodic solutions for some neutral functional differential equations.
Weibing Wang, Jianhua Shen
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Positive Periodic Solutions of Coupled Singular Rayleigh Systems
Qualitative Theory of Dynamical Systems, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kong, Fanchao +2 more
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Positive periodic solutions of nonlinear functional differential equations
Applied Mathematics and Computation, 2004The authors investigates the existence of positive periodic solutions for the first-order functional-differential equation \[ x'(t)= -a(t) x(t)+ f(t, x_t),\tag{\(*\)} \] where \(a(t)\) is a \(T\)-periodic function satisfying \[ \exp\Biggl(\int^T_0 a(u) du\Biggr)> 1, \] \(f(t, x_t)\) is a nonnegative function defined on \(\mathbb{R}\times BC\), where ...
Yongkun Li 0002, Lifei Zhu
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