please tell me how you can draw this matrix? http://cs630020.vk.me/v630020830/28b26/N3_2ms3duzg.jpg

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    Welcome! What have you tried so far? Can you show us some code? Did you search this web page? I think that was allready answered ... – Mensch Apr 23 '16 at 22:18

A solution with pstricks:

\usepackage{pst-node, pst-plot}


    \psset{dy=-1, labels=none, ticks=none, xunit =0.8, yunit=-0.5, linejoin=1,arrowinset=0.15}
    \psline{ <->}(0,10)(0,0)(11,0)
    \begin{psclip}{\psframe[linestyle=none, framesep=2pt](0,0)(6.5,6)}
    \psset{linestyle =dotted, linewidth=1.5pt}
    \begin{psclip}{\psframe[linestyle=none, framesep=2pt](6.4,0)(9.9,6)}
        \multido{\i =1+2}{3}{\psline(6.3,\i)(10,\i)}


enter image description here

| improve this answer | |
  • Bernard, thank you kindly, I have long worked this matrix, the problem was the diagonal line. – Иван Нода Apr 25 '16 at 22:42
  • You're welcome. I'm glad to have been helpful! – Bernard Apr 25 '16 at 22:44

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