The present diploma work deals with the construction of interpolation polynomials and polynomial splines. Strictly diagonal dominance and index of diagonally dominant matrix are defined. Based on given data points and values of consecutive higher order derivatives, formula for general Hermite interpolation is presented. We use that formula on the given data points with specified first derivatives at the interpolation points. The method for obtaining cubic Hermite interpolating spline with minimal derivative oscillation is described. In order to determine those polynomials, we consider functionals and the least squares method. We present the error analysis of the interpolant. Parametric curve design and the effect of the choice of interpolation parameters on visual appearance of the curve are described. The results are illustrated with several numerical examples.
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