Mathematical background and error analysis; source of errors, numerical stability and convergence. Solution of nonlinear equations in one variable; bisection method, Newton's method, beam method, Muller's method. General theory for single-point iteration methods, multiple roots, Brent's algorithm. Principle of contraction transformation, Newton's method for systems of nonlinear equations. Polynomial interpolation theory, Newton divided differences, interpolation error analysis. Hermite interpolation, piecewise polynomial interpolation, Chebyshev interpolation. Cubic splayns, Bezier curves, multidimensional interpolation. Weierstrass theorem, multidimensional Taylor theorem, minimax approximation. Least squares approximation. Numerical differentiation; finite difference formulae, rounding error, extrapolation. General differentiation formula for points of variable length, numerical differentiation with slightly modified data. Numerical integration; compound methods of numerical integration, Simpson's rules, weighted Newton-Cotes and Gauss formulae, Gaussian numerical integration. Peano representations of linear functionals, extrapolation methods, Romberg integration. Numerical calculation of singular integrals, multidimensional numerical integration.