\psset{xunit=1cm, yunit=1cm} %\psframebox{ \begin{pspicture}(-0.7,-0.7)(4.8,2.6) %\psgrid[%griddots=20, %gridlabels=0pt, subgriddiv=10](0,0)(3,3) \psaxes[Ox=0,Dx=1,Oy=0,Dy=1,linewidth=0.5pt,linecolor=blue, ticks=noticks]{->}(0,0)(-0.2,-0.2)(3,2.2)%Schnittpunkt, x0, y0 x1,y1 \psline[linecolor=orange]{->}(0,0)(2.5,0.5) \psline[linewidth=0.2pt,linecolor=orange](2.5,-0.2)(2.5,0.5) \psline[linewidth=0.2pt,linecolor=orange](-0.2,0.5)(2.5,0.5) \psline[linecolor=red]{->}(0,0)(0.5,1.5) \psline[linewidth=0.2pt,linecolor=red](-0.2,1.5)(0.5,1.5) \psline[linewidth=0.2pt,linecolor=red](0.5,-0.2)(0.5,1.5) \psline[linecolor=red, linestyle=dashed](2.5,0.5)(3,2) \psline[linecolor=orange,linestyle=dashed](0.5,1.5)(3,2) \rput[l](3.1,1.5){\tiny{Fl\"ache $\left|det\left(A\right)\right|$}} \rput[c](0.5,-0.4){$a_{21}$} \rput[c](2.5,-0.4){$a_{11}$} \rput[c](-0.45,0.5){$a_{12}$} \rput[c](-0.45,1.5){$a_{22}$} \rput[c](3.2,0){$x$} \rput[c](0,2.4){$y$} \pscurve[linewidth=0.5pt]{->}(3.4,1.4)(3.3,1.35)(2.9,1.3)(2.4,1.4) \end{pspicture}%}