Proof of `Raw matrix frames and their tensor realization`
What this proof establishes
no assumptions
Assuming the claims on the left, the claim on the right holds — checked by the archive's pipeline. Proof code is not displayed here.
Description
Injectivity of the two primal frames recovers each column and row of the coefficient matrix. Transposing the minus annihilator gives , which makes every self-contraction vanish.