\begin{pspicture}(-0.1,-0.1)(7,1.3) %\psgrid(0,0)(7, 1.3) \rput[l](0.1,1.1){$\vec a \rnode{a}\times \vec b = \left( {a_2 b_3 - a_3 b_2 ,a_3 b_1 - a_1 b_3 ,a_1 b_2 - a_2 b_1 } \right)$} \rput[l](0.1,0.1){"Kr\Rnode[e]{ae}euz"} %\nccurve[angleA=0]{->}{ae}{a} %\ncbar[nodesep=1pt]{->}{ae}{a} \ncline[arrows=->,linecolor=red]{ae}{a} \end{pspicture}