Proof of `Triangle relations separate into individual label blocks` (3rd statement)
groundedproofs/Lax342547Proofs/LabelRelations.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
Pad each of the three supports by zero in their union, of size at most 3R. Combine the block sums and apply uniqueness to their labelwise sum.