Proof of `Selected label coefficients agree across the cut profile` (5th statement)
groundedproofs/Lax342547Proofs/SelectedScalars.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
Fix one edge from the selected tag. A triangle through any other edge has zero on its off-star edge, so its two star coefficients agree.