
We obtain some existence results for multiple positive periodic solutions of some delay differential systems. Examples are presented as applications. For a general positive integer m ≥ 2, main results of this paper do not appear in former literatures as we know. Comparing with the existing results, our results are new also when m = 1.
Discontinuous Systems, Applications of operator theory to differential and integral equations, delay, Applied Mathematics, Bifurcations in Planar Polynomial Systems, Public Health, Environmental and Occupational Health, periodic solution, Theory and Applications of Fractional Differential Equations, Computer science, Periodic solutions to functional-differential equations, Algorithm, Disease Transmission and Population Dynamics, Physical Sciences, Health Sciences, QA1-939, FOS: Mathematics, Medicine, Geometry and Topology, Mathematics, Nonlinear Systems
Discontinuous Systems, Applications of operator theory to differential and integral equations, delay, Applied Mathematics, Bifurcations in Planar Polynomial Systems, Public Health, Environmental and Occupational Health, periodic solution, Theory and Applications of Fractional Differential Equations, Computer science, Periodic solutions to functional-differential equations, Algorithm, Disease Transmission and Population Dynamics, Physical Sciences, Health Sciences, QA1-939, FOS: Mathematics, Medicine, Geometry and Topology, Mathematics, Nonlinear Systems
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