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Structuring Logic with Sequent Calculus

Structuring Logic with Sequent Calculus

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What Disjunction?<br />

We saw two possible rules for disjunction on the right:<br />

and<br />

Γ ⊢ A, B, ∆<br />

Γ ⊢ A ∨ B, ∆<br />

Γ ⊢ A, ∆<br />

Γ ⊢ A ∨ B, ∆<br />

Γ ⊢ B, ∆<br />

Γ ⊢ A ∨ B, ∆<br />

Which one shall we choose for intuitionistic logic?<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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