#!/usr/bin/gnuplot set terminal postscript eps font 'Helvetica' set output unset border unset key set size 0.5,0.5 set zeroaxis lt -1 lw 2 set xtics axis -1.5,0.5,0.5 set ytics axis -1,1,1 quadra(x) = x*x+x-1 set label 1 at 0,-1 point pt 7 ps 1.5 set label 2 at 0.62,0 point pt 6 lw 1.5 ps 1.5 set label 3 at 1,0.3 "p" set label 4 at 0.1,1.4 "C(p)U" set arrow 1 from 1.0,0 to 1.2,0 filled size 0.1,15,60 lw 2 set arrow 2 from 0,1.5 to 0,1.7 filled size 0.1,15,60 lw 2 set arrow 3 from 0,-1 to 0.3,-0.7 filled size 0.1,15,60 lw 1 plot [-2:1] [-2:1.7] quadra(x)