Logiweb aspects of prop lemma add double neg in pyk

Up Help

The predefined "pyk" aspect

define pyk of prop lemma add double neg as text unicode start of text unicode small p unicode small r unicode small o unicode small p unicode space unicode small l unicode small e unicode small m unicode small m unicode small a unicode space unicode small a unicode small d unicode small d unicode space unicode small d unicode small o unicode small u unicode small b unicode small l unicode small e unicode space unicode small n unicode small e unicode small g unicode end of text end unicode text end text end define

The predefined "tex" aspect

define tex of prop lemma add double neg as text unicode start of text unicode capital a unicode small d unicode small d unicode capital d unicode small o unicode small u unicode small b unicode small l unicode small e unicode capital n unicode small e unicode small g unicode end of text end unicode text end text end define

The user defined "the statement aspect" aspect

define statement of prop lemma add double neg as system zf infer all metavar var a end metavar indeed metavar var a end metavar infer not0 not0 metavar var a end metavar end define

The user defined "the proof aspect" aspect

define proof of prop lemma add double neg as lambda var c dot lambda var x dot proof expand quote system zf infer all metavar var a end metavar indeed not0 not0 not0 metavar var a end metavar infer prop lemma remove double neg modus ponens not0 not0 not0 metavar var a end metavar conclude not0 metavar var a end metavar cut all metavar var a end metavar indeed 1rule deduction modus ponens all metavar var a end metavar indeed not0 not0 not0 metavar var a end metavar infer not0 metavar var a end metavar conclude not0 not0 not0 metavar var a end metavar imply not0 metavar var a end metavar cut metavar var a end metavar infer prop lemma weakening modus ponens metavar var a end metavar conclude not0 not0 not0 metavar var a end metavar imply metavar var a end metavar cut 1rule ad absurdum modus ponens not0 not0 not0 metavar var a end metavar imply metavar var a end metavar modus ponens not0 not0 not0 metavar var a end metavar imply not0 metavar var a end metavar conclude not0 not0 metavar var a end metavar end quote state proof state cache var c end expand end define