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Structuring Logic with Sequent Calculus

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Correspondence between classical and intuitionistic<br />

provability (1)<br />

LJ is clearly weaker than LK: Γ ⊢ LJ A implies Γ ⊢ LK A<br />

Can we make more precise the relation between the two notions of<br />

provability?<br />

We will see that LJ can be considered not to be weaker than LK<br />

but finer!<br />

Alexis Saurin – ENS Paris & École Polytechnique & CMI <strong>Structuring</strong> <strong>Logic</strong> <strong>with</strong> <strong>Sequent</strong> <strong>Calculus</strong>

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