A class of fractional evolution equations and optimal controls. (English) Zbl 1214.34010

Wang, Jinrong; Zhou, Yong

Nonlinear Anal., Real World Appl. 12, No. 1, 262-272 (2011).

The authors, using the techniques of fractional calculus, a singular version of Gronwall’s inequality and the Leray-Schauder fixed point theorem for compact maps, study the existence of solutions of a fractional evolution equation of the type
\[ D^qx(t)=-Ax(t)+f(t,x(t)),\qquad t \in J=[0,T],~q \in (0,1), \]
\[ x(t_0)=x_0. \]
They introduce a notion of \(\alpha\)-mild solution which is associated with a probability density function and a semigroup operator. Further, the existence of an optimal control for a Lagrange problem is proved. An example is given to demonstrate their results.

Reviewer: J. Vasundhara Devi (Visakhapatnam)

MSC:

34A08	Fractional ordinary differential equations
34G20	Nonlinear differential equations in abstract spaces
49J27	Existence theories for problems in abstract spaces

Keywords:

fractional evolution equations; analytic compact semigroup; fractional power space; \(\alpha\)-mild solutions; optimal controls

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