G4 Prover

Result of the test for sequent p/\(p->q)/\(p/\q->s)-->s

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/\(p->q)/\p/\q->s-->s. Trying to prove with threshold = 0 Succeed in proving p/\(p->q)/\p/\q->s --> s (1 msec.) pretty:1 = ------------- Ax s,p,p,q --> s ---------------- L0->1 q,p,p,q->s --> s ----------------- L/\ q,p,p/\q->s --> s -------------------- L0->1 p,p->q,p/\q->s --> s ----------------------- L/\ p,(p->q)/\p/\q->s --> s ------------------------ L/\ p/\(p->q)/\p/\q->s --> s yes fol(g4i)> quit. yes Exit from Sequent Calculus Prover... Total CPU time = 4 msec. true

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