Proof of `Sparse residual contractions belong to the actual primal pins` (1st statement)
groundedproofs/Lax342547Proofs/PrimalContractions.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
Test products of nominal quotient functionals. The tested functional is supported on one endpoint; the other tensor vanishes. Double annihilation places that endpoint contraction in the nominal subspace.