Periodic solutions of abstract neutral functional differential equations

Periodic Solutions of the Second-Order Neutral Functional Differential Systems with Operator Varying in Time and Delays

“…Since the coefficient matrix C.t / is not a constant matrix C; the results obtained in the present paper cannot be deduced from [1,2,4,5,[8][9][10][11].…”

“…In recent years, the problem of existence of periodic solutions to functional differential systems has been extensively investigated (see [1,2,4,5,[7][8][9][10][11][12] and the references therein). In [2], Các discussed the existence of 2 -periodic solutions of the systems…”

Periodic Solutions in UMD Spaces for Some Neutral Partial Functional Differential Equations

“…In [2], C. Lizama established results on the existence of periodic solutions of Equation 1 is a linear operator on an UMD-space X. In [3], Hernan et al, studied the existence of periodic solution for the class of linear abstract neutral functional differential equation described in the following form:…”

On the piecewise pseudo almost periodic solution of nondensely impulsive integro-differential systems with infinite delay

“…On the other hand, many researchers are interested to periodic concept, in particular studied the existence and stability of periodic solutions ( [20], [26], [38]) and the references cited therein. However, upon considering longterm dynamical behaviors it is possible for the various components of the model to be periodic with rationally independent periods, and therefore it is more reasonable to consider the various parameters of models to be changing almostperiodically rather than periodically.…”