2 problems

Border Comon's conjecture for minimal border rank. If

Let $A_j=A_j'\oplus A_j”$ be decompositions of vector spaces, and set … Let $X=\operatorname{Seg}(\mathbb P A_1\times\cdots\times\mathbb P A_k)$, and let $R_X$ denote the $X$-rank.…