Proof of `Quotient extractors isolate individual tensor label blocks` (1st statement)
groundedproofs/Lax342547Proofs/TensorBlocks.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
Expand the base matrix in elementary outer products. Each lifted outer product contracts to the bilinear form evaluated on its two lifted factors.