Proof of `The Personnel example`
groundedproofs/Lax392996Proofs/Bridge.lean · lax-392996
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
By computation: the join yields the five pairs of persons of a same city with increasing ids, projected to their city and deduplicated.