Zanichelli Editore , New-York, 2019
The classical order differential operators play an important role in describing the physical phenomenon of dynamic systems. The differential operator is mainly used for formulating the physical system and analyzing its dynamic behavior. In view of describing the complex behavior of the system, the classical differential operator fails to describe the viscoelastic behavior which lays between the normal integer orders descriptions. The convenient way to analyze the intermediate behavior of the system, the differential operator of variable order is introduced.