G4 Prover

Result of the test for sequent p->q <--> ~p\/q

G4 Prover: a Prolog Prover for Roy Dyckhoff's Sequent Calculus G4 This prover is a fork made by Joseph Vidal-Rosset (joseph.vidal-rosset@gmail.com), from seqprover.pl, the sequent prover for CL-X, written by Naoyuki Tamura (tamura@kobe-u.ac.jp). Type "help." if you need some help. fol(g4i)> fol(g4i). yes fol(g4i)> output(pretty). yes fol(g4i)> p->q<--> ~p\/q. Trying to prove with threshold = 0 1 2 3 4 5 Fail to prove p->q --> ~p\/q (10 msec.) Trying to prove with threshold = 0 Succeed in proving ~p\/q --> p->q (2 msec.) pretty:1 = ----------- Lbot bot,p --> q -------------- L0->1 p,p->bot --> q --------------- R-> --------- Ax p->bot --> p->q p,q --> q --------------- L~def ---------- R-> ~p --> p->q q --> p->q ------------------------------- L\/ ~p\/q --> p->q yes fol(g4i)> quit. yes Exit from Sequent Calculus Prover... Total CPU time = 14 msec. true

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Maintained by Joseph Vidal-Rosset