-3 6 setyrange quadrillage .5 setlinewidth tracerepere marks /A {-4 -1} def /B {1.5 3} def /C {4 5} def <tex> $\vec \imath $ </tex> .7 0 [1.5 dup] dltexlabel <tex> $\vec \jmath $ </tex> 0 .7 [1.5 dup] dltexlabel setTimesItalic (O) O dltext