TO CALCULATION OF THE ANGLE AT THE POINT OF IRREGULARITY OF CONTOUR
In this article some elements of the algorithm for computer identification of distinctions in regressive points are described. They occur during the plotting of conjoined outlines, checking the condition of transversal to the distinctions and calculation of the angle at the point of irregularity. The proof of this algorithm uses the Boardman's classification of ideals in germs of smooth functions algebra. Some computer images of irregularity points and lines of regressive points are provided. Some formulas for calculation of the angle at the point of irregularity are provided.