EXISTENCE AND MULTIPLICITY OF POSITIVE PERIODIC SOLUTIONS FOR A CLASS OF SECOND ORDER DAMPED FUNCTIONAL DIFFERENTIAL EQUATIONS WITH MULTIPLE DELAYS

[1]  A. Ardjouni,et al.  Existence of positive periodic solutions of nonlinear neutral differential systems with variable delays , 2017, ANNALI DELL'UNIVERSITA' DI FERRARA.

[2]  Pedro J. Torres,et al.  Maximum and antimaximum principles for a second order differential operator with variable coefficients of indefinite sign , 2011, Appl. Math. Comput..

[3]  A. Ardjouni,et al.  Periodicity and continuous dependence in iterative differential equations , 2020, Rendiconti del Circolo Matematico di Palermo Series 2.

[4]  S. Trofimchuk,et al.  Traveling waves solutions for partial neutral differential equations , 2020 .

[5]  Ngo Van Hoa.  Existence results for extremal solutions of interval fractional functional integro-differential equations , 2018, Fuzzy Sets Syst..

[6]  C. Tunç,et al.  New Qualitative Results for Solutions of Functional Differential Equations of Second Order , 2018, Discrete Dynamics in Nature and Society.

[7]  Yuexiang Wu.  Existence nonexistence and multiplicity of periodic solutions for a kind of functional differential equation with parameter , 2009 .

[8]  Feifan Li,et al.  Positive Periodic Solutions for a Kind of Second-Order Neutral Differential Equations with Variable Coefficient and Delay , 2018, Mediterranean Journal of Mathematics.

[10]  Donal O'Regan,et al.  Multiplicity of positive periodic solutions to second order differential equations , 2006 .

[11]  Jifeng Chu,et al.  Periodic solutions for second order singular damped differential equations , 2012 .

[12]  Yongxiang Li,et al.  On the Existence of Positive Periodic Solutions for Second-Order Functional Differential Equations with Multiple Delays , 2012 .

[13]  Wenjie Zuo,et al.  On monotone method for first and second order periodic boundary value problems and periodic solutions of functional differential equations , 2004 .

[14]  Pedro J. Torres,et al.  Existence of one-signed periodic solutions of some second-order differential equations via a Krasnoselskii fixed point theorem , 2003 .

[15]  Y. Kuang.  Delay Differential Equations: With Applications in Population Dynamics , 2012 .

[16]  Sui Sun Cheng,et al.  Periodic solutions for second order periodic differential equations under scalable control , 2012, Appl. Math. Comput..

[17]  Fevzi Erdogan,et al.  Stochastic numerical approach for solving second order nonlinear singular functional differential equation , 2019, Appl. Math. Comput..

[18]  M. Muminov.  On the method of finding periodic solutions of second-order neutral differential equations with piecewise constant arguments , 2017 .

[19]  K. Deimling.  Nonlinear functional analysis , 1985 .

[20]  J. Hale.  Theory of Functional Differential Equations , 1977 .