This book, structured according to the analytical program of the Special Mathematics course within the Faculty of Transports, University
Politehnica Bucuresti, is a work that we hope will be useful not only to the students of this faculty, but to all the students from the mechanical profile of the technical universities.
The notions presented are structured in 6 chapters: Differential, linear equations, with constant coefficients; Systems of linear equations,homogeneous, with constant coefficients; Complex analysis; Fourier transform; Laplace transformation; Z transformation.