engleski

Osculating Circles of Conics in the Isotropic Plane

In the isotropic plane there are seven types of conics relative to their position to the absolute figure (F, f). The paper shows how to construct an osculating circle in any point of a real conic. In the Euclidean plane every conic has at least one real vertex, i.e.a point where hyperosculating circle exists. In the isotropic plane only real ellipses and hyperbolas of the 2nd type have two real vertices. For those types of conics are the hyperosculating circles constructed as perspective collinear images of a given conic with appropiately selected elements of collineation.

isotropic plane; osculating circle; vertex of a conics; perspective collineation

Rad je prezentiran na skupu 13th Scientific-Professional Cilloquium on Geometry and Graphics, održanom od 07.-11.09.2008., Poreč, Hrvatska, objavljen uz domaću recenziju u Abstracts of the 13th Scientific-Professional Cilloquium on Geometry and Graphics / S. Gorjanc, E. Jurkin (ur.). - Zagreb : Hrvatsko duštvo za geometriju i grafiku, 2008. str. 24-24.