Towards finding hay in a haystack: explicit tensors of border rank greater than $2.02m$ in $C^m\otimes C^m\otimes C^m$ (1912.11927v1)

Abstract: We write down an explicit sequence of tensors in $C^m\otimes C^m\otimes C^m$, for all $m$ sufficiently large, having border rank at least $2.02m$, overcoming a longstanding barrier. We obtain our lower bounds via the border substitution method.