The system ip and relations of classification of generalized tautologies among the systems ip and its 3 - valued system and the system c2 is investigated . it is proved that generalized tautologies are decidable in the system ip 本文分兩種情形b一0與p 0 )研究了系統(tǒng)lp與其三元子代數(shù)及經(jīng)典二值系統(tǒng)q之間(廣川重言式的關(guān)系,指出在系統(tǒng)lp中廣義重言式是可判定的