12 lines
328 B
Plaintext
12 lines
328 B
Plaintext
Class 15 : Proofs with assumptions--inductive definition of provable formulas
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example : deriving \beta from assumptions {\alpha, (\neg \alpha))}.
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Monotonicity
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Strong monotonicity
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Deduction theorem
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Example : { (\alpha => \beta), (\beta => \gamma)} \derives (\alpha => \gamma)
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Proof of one direction of deduction theorem.
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