Lectures (Theoretical lectures). Relations, functions, polynomials, complex numbers, free vectors, analytical geometry in space (vector!), determinants, systems of linear equations, matrices, characteristic roots and vectors. Metric space. Sequences (convergence of sequences, real and complex sequences, complete metric space). Limits, continuity, uniform continuity and differentiability of functions. Functions of several variables (partial derivatives, differentiability, extreme values). Practice (Exercises): In practice classes adequate examples and tests from the theoretical lectures are done in order to exercise lectured theory where exercises contribute to understanding of the theory.