Does demography need differential equations?

Random fractional functional differential equations

In this paper, we prove the existence and uniqueness results to the random fractional functional differential equations under assumptions more general than the Lipschitz type condition. Moreover, the distance between exact solution and appropriate solution, and the existence extremal solution of the problem is also considered.

Solution of fuzzy differential equations

Hybrid system is a dynamic system that exhibits both continuous and discrete dynamic behavior‎. ‎The hybrid differential equations have a wide range of applications in science and engineering‎. ‎The hybrid systems are devoted to modeling‎, ‎design‎, ‎and validation of interactive systems of computer programs and continuous systems‎. ‎Hybrid fuzzy differential equations (HFDEs) is considered by ...

Fuzzy Local Fractional Differential Equations

How Much Time Does It Need to Write an Article?

سخن سردبیر Editorial مجله دانشگاه علوم پزشکی رفسنجان دوره نوزدهم، خرداد 1399، 222-221       چقدر زمان برای نوشتن یک مقاله مورد نیاز است؟ How Much Time Does It Need to Write an Article?   محسن رضائیان[1]   M. Rezaeian   اگر برای شما این سؤال پیش آمده است که: " چقدر زمان برای نوشتن یک مقاله مورد نیاز است؟" خواندن فصل پنجم کتاب "چگونه مقالات بهتر پزشکی بنویسیم" (How to write better m...

Functional Differential Equations Close to Differential Equations

when the lag function r(t) is nearly constant for large /, and has also asked for conditions on the function r under which all solutions approach zero as t—» oo. The purpose of this announcement is to initiate a study of various stability and oscillation problems for equations with perturbed lag functions, and to suggest that a modification of the familiar method of conversion to an integral eq...