Joint differential invariants of binary and ternary forms

Polat G. G., Olver P. J.

PORTUGALIAE MATHEMATICA, vol.76, no.2, pp.169-204, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 2
  • Publication Date: 2019
  • Doi Number: 10.4171/pm/2032
  • Journal Name: PORTUGALIAE MATHEMATICA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.169-204
  • Istanbul Kültür University Affiliated: Yes

Abstract

We use moving frames to construct and classify the joint invariants and joint differential invariants of binary and ternary forms. In particular, we prove that the differential invariant algebra of ternary forms is generated by a single third order differential invariant. To connect our results with earlier analysis of Kogan, we develop a general method for relating differential invariants associated with different choices of cross-section.