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