The main goal of the book "Signals and Systems of Continuous and Discrete Time" is to present the fundamental concepts related to the respective thematic field.

This presentation follows a purely didactic approach, so that the higher education students to whom the book is addressed can acquire through its study the essential knowledge and skills required for their specialization in more advanced issues, such as telecommunications and control systems.

The analytical presentation of the theory is accompanied by hundreds of exemplary solved and unsolved exercises, so that the reader can immediately and easily delve into the material presented, as well as the way in which it is applied in practice.

Due to the mathematical complexity that characterizes this thematic field, understanding the material presented in the book requires knowledge of basic concepts from algebra and mathematical analysis, such as matrix theory, the concepts of partial derivatives and integrals, as well as differential equations and difference equations for continuous and discrete quantities, respectively.

Particular emphasis should also be placed on some techniques for computing inverse transformations, such as polynomial division, the expansion of a rational function into partial fractions, and the computation of integrals in the complex plane using residue calculus.

To help the reader become familiar with at least the most basic of these concepts, an appendix of mathematical introduction type has been added at the end of the book, which describes the aforementioned concepts with a certain degree of detail.