Bautin ideal of a cubic map
Bibliographic entry
Benediktovitch, I. Bautin ideal of a cubic map / I. Benediktovitch, V. Romanovski // Applied Mathematics Letters. – 2001. – Vol. 14, № 2. – P. 159-165.
Abstract
We compute the radical of the ideal generated by the first three focus quantities of maps defined by irreducible branches of a cubic curve on the real plane. It is shown that the ideal is not radical in this case.