1 setxyrapport 30 setxunit 7.5 setborder 90 setangle_repere -4.8 12.5 setxrange -1.8 12.5 setyrange 1 1 settkstep .5 .5 setsubtkstep 1 1 setmkstep ticks traceaxes unites /f {setxvar #rpn# 1/20*(x-5)^3+5 } def gsave bleu .75 setlinewidth continu 1 10 {f} Courbe grestore /M {3 4.6} def /N {9 8.2} def M dashpoint N dashpoint gsave setTimesItalic #latex#${\overrightarrow{i}}$ 1 0 [2 2] dctexlabel #latex#${\overrightarrow{j}}$ 0 1 [2 2] cltexlabel (O) 0 0 [2 2] dltext #latex#${\mathcal{C}_f}$ 9.5 9 [2.5 2.5] crtexlabel grestore #latex#${u}$ 3 0 [2 2] dctexlabel #latex#${v}$ 9 0 [2 2] dctexlabel #latex#${f(u)}$ 0 4.6 [2 2] cltexlabel #latex#${f(v)}$ 0 8.2 [2 2] cltexlabel ${u\leqslant v}$ boxit 6 -0.5 [2 2] dctexlabel ${f(u)\leqslant f(v)}$ boxit -0.5 6.4 [2 2] cltexlabel