Proof Mining - Mathematics, Algorithms and Proofs
Proof Mining - Mathematics, Algorithms and Proofs
Proof Mining - Mathematics, Algorithms and Proofs
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<strong>Proof</strong> <strong>Mining</strong><br />
where only x =IN y primitive equality predicate but for ρ → τ<br />
x X =X y X :≡ dX(x, y) =IR 0IR,<br />
s =ρ→τ t :≡ ∀v ρ (s(v) =τ t(v)).<br />
The theory A ω [X, d, W ] results by adding constants<br />
bX, dX, WX axiom expressing that (X, d, W ) is a nonempty<br />
b-bounded hyperbolic space.<br />
Definition 11<br />
F ≡ ∀a σ Fqf (a) (resp. F ≡ ∃a σ Fqf (a)) is a ∀-formula (∃-formula)<br />
if Fqf is quantifier-free <strong>and</strong> σ are of the kind<br />
IN, IN → IN, X, IN → X, X → X.<br />
Ulrich Kohlenbach 16