Proof of `Existential second-order logic`
groundedproofs/Lax988886Proofs/Isomorphism.lean · lax-988886
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
Transport both input tuples and existential witness relations along the isomorphism; induction on the first-order matrix preserves satisfaction.