-4 5 setxrange
-2 4 setyrange
20 setxunit
traceOx
%xticks
0 xtick
[0 ] {xmark} apply
/A{-3.3 0} def
/B {3 0} def
/C{-3 -0.3} def
/D{3 -0.3} def
/E{2 2.5} def
/F{-2 2.5} def
1.7 setlinewidth
rouge
[A B] ([-]) ligne
$$
1- \sqrt{2}
$$
%% exemple 1 : simple
C dctexlabel
$$
\sqrt{2}-1
$$
D dctexlabel
setTimesItalic
() C dltext
() B drtext
bleu
/arrowscale {2 dup} def
/angleA 60 def
/angleB 120 def
0 0.5 3 0.5 (->) pccurve
%/arrowscale {2 dup} def
/angleA 60 def
/angleB 120 def
-3 0.5 0 0.5 (<-) pccurve
vert
$$
\sqrt{2}-1
$$
E dctexlabel
$$
\sqrt{2}-1
$$
F dctexlabel