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Proof of `Existential second-order logic`
groundedproofs/Lax678846Proofs/Isomorphism.lean · lax-678846
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.