# G4 Prover

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

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<-->p.
Trying to prove with threshold = 0
Succeed in proving p/\p --> p (1 msec.)
pretty:1 =
--------- Ax
p,p --> p
---------- L/\
p/\p --> p
Trying to prove with threshold = 0
Succeed in proving p --> p/\p (1 msec.)
pretty:2 =
------- Ax ------- Ax
p --> p p --> p
------------------- R/\
p --> p/\p
yes
fol(g4i)> quit.
yes
Exit from Sequent Calculus Prover...
Total CPU time = 3 msec.
true