On the geometry of border rank algorithms for n x 2 by 2 x 2 matrix multiplication

Abstract

We make an in-depth study of the known border rank (i.e. approximate) algorithms for the matrix multiplication tensor encoding the multiplication of an n x 2 matrix by a 2 x 2 matrix.

19 pages, two figures

Cited by in corpus (1)

• On the geometry of border rank algorithms for matrix multiplication and other tensors with symmetry