Logiweb aspects of disjin2 in pyk

Up Help

The predefined "pyk" aspect

define pyk of disjin2 as text unicode start of text unicode small d unicode small i unicode small s unicode small j unicode small i unicode small n unicode two unicode end of text end unicode text end text end define

The predefined "tex" aspect

define tex of disjin2 as text unicode start of text unicode newline unicode capital d unicode small i unicode small s unicode two unicode end of text end unicode text end text end define

The user defined "the statement aspect" aspect

define statement of disjin2 as system s infer all metavar var a end metavar indeed all metavar var b end metavar indeed metavar var b end metavar infer not metavar var a end metavar imply metavar var b end metavar end define

The user defined "the proof aspect" aspect

define proof of disjin2 as lambda var c dot lambda var x dot proof expand quote system s infer all metavar var a end metavar indeed all metavar var b end metavar indeed metavar var b end metavar infer lemma a one conclude metavar var b end metavar imply not metavar var a end metavar imply metavar var b end metavar cut rule mp modus ponens metavar var b end metavar imply not metavar var a end metavar imply metavar var b end metavar modus ponens metavar var b end metavar conclude not metavar var a end metavar imply metavar var b end metavar end quote state proof state cache var c end expand end define