This book covers some selected problems of the descriptor integer and
fractional order positive continuous-time and discrete-time systems.
The book consists of 3 chapters, 4 appendices and the list of
references. Chapter 1 is devoted to descriptor integer order
continuous-time and discrete-time linear systems. In Chapter 2,
descriptor fractional order continuous-time and discrete-time linear
systems are considered. Chapter 3 is devoted to the stability of
descriptor continuous-time and discrete-time systems of integer and
fractional orders. In Appendix A, extensions of the Cayley-Hamilton
theorem for descriptor linear systems are given. Some methods for
computation of the Drazin inverse are presented in Appendix B. In
Appendix C, some basic definitions and theorems on Laplace transforms
and Z-transforms are given. Some properties of the nilpotent matrices
are given in Appendix D.