Proof of `Baseline bilinear extensions retaining all frozen rows and columns` (1st statement)
groundedproofs/Lax342547Proofs/FrozenBaselines.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
In a frozen row or column the complementary table part vanishes and the two repeated actual terms cancel. On the table product, expand each argument into its pin and complementary parts. Compatibility identifies every term containing a pin with its actual value.