Proof of `Primal projections and preservation of effective spaces` (2nd statement)
groundedproofs/Lax342547Proofs/ProjectedPins.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
Exact pin extension includes the old nominal spaces, and taking the same endpoint primal projection preserves this inclusion.