This book contains:

a) Theoretical elements, methodology, as well as various ways of thinking and problem-solving with exemplary solved exercises, characteristic examples, and applications.

b) Exercises-problems for solution and questions that will meet the requirements of students at every level, as well as exam-type exercises for foreign universities, because surely some will be called upon to face such issues and must familiarize themselves with them from now on.

c) Indicative proposals for written tests of various types.

d) Solutions or hints for the solutions of the exercises and questions in this book, as well as the school's.