# G4 Prover

### Result of the test for sequent p-->(q->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-->q->p.
Trying to prove with threshold = 0
Succeed in proving p --> q->p (1 msec.)
pretty:1 =
--------- Ax
q,p --> p
---------- R->
p --> q->p
yes
fol(g4i)> quit.
yes
Exit from Sequent Calculus Prover...
Total CPU time = 2 msec.
true