Computer-Aided Graphical Representation of Conic Section Pencils

U jednom prethodnom radu pokazano je kako se može programirati grafičko prikazivanje pojedine konike na temelju koeficijenata njezine jednadžbe u općem obliku. U ovome radu objašnjava se pramen konika te uočava da u njemu ne može biti bilo koji broj konika paraboličkog tipa, nego da takve mogu biti samo sve, ili dvije, ili jedna ili niti jedna. Pramen konika ilustrira se na nekoliko primjera iz kartografije.In one of the previous works it has been shown how graphic presentation of an individual conics can be programmed on the basis of the coefficient of its equation in the general form. In this paper the conic section pencil is explained, and it is noted that it cannot contain any number of conics of parabolic type, but that only all of them, or two, or one or none can be of such type. The conic section pencil is illustrated through several examples from cartography