The tensor product of two arrays is notionally an outer product of the arrays collapsed in specific extents by summing along the appropriate diagonals.
copied from cf-post-staging / r-tensor
https://anaconda.org/conda-forge/r-tensor/badges/version.svg
https://anaconda.org/conda-forge/r-tensor/badges/latest_release_date.svg
https://anaconda.org/conda-forge/r-tensor/badges/latest_release_relative_date.svg
https://anaconda.org/conda-forge/r-tensor/badges/platforms.svg
https://anaconda.org/conda-forge/r-tensor/badges/license.svg
https://anaconda.org/conda-forge/r-tensor/badges/downloads.svg