Associated forms of binary quartics and ternary cubics

J. Alper, A. V. Isaev, N. G. Kruzhilin

Let ${\mathcal{Q}}_n^d$ be the vector space of forms of degree $d\ge 3$ on ${\mathbb{C}}^n$, with $n\ge 2$. The object of our study is the map $\Phi$, introduced in papers [EI], [AI1],…