Proof of `Exact images mixing independent injective frames` (5th statement)
groundedproofs/Lax342547Proofs/ProductImages.lean · lax-342547
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
A left inverse of the coefficient matrix makes right multiplication surjective, so it sends the uniform column matrix to a uniform image.