define pyk of prop lemma contrapositive 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 c unicode small o unicode small n unicode small t unicode small r unicode small a unicode small p unicode small o unicode small s unicode small i unicode small t unicode small i unicode small v unicode small e unicode end of text end unicode text end text end define
define tex of prop lemma contrapositive as text unicode start of text unicode capital c unicode small o unicode small n unicode small t unicode small r unicode small a unicode small p unicode small o unicode small s unicode small i unicode small t unicode small i unicode small v unicode small e unicode end of text end unicode text end text end define
The pyk compiler, version 0.grue.20060417+ by Klaus Grue,