Vjylku

Hi¡ I'm workin with a diagram and I don't know how to do. I almost finished it but the last part is so difficult. Can you help me?
I want to my diagram looks like

And the code that I have is the next

begin{tikzpicture}[edge from parent/.style={draw,-latex}]

node {Lindelöf} [sibling distance=6cm]

child {node {Casi Lindelöf}

child {node {Débilmente Lindelöf} [sibling distance=1.5cm]

}

}

;

end{tikzpicture}

From that I obtain the diagram of the image without the blue part. How can I conclude it? I really appreciate any help you can provide me.

One way is to add a node relative to the tree.

documentclass[tikz,border=3.14mm]{standalone}

usetikzlibrary{trees,positioning}

begin{document}

begin{tikzpicture}[edge from parent/.style={draw,-latex}]

node (Lin) {Lindel"of} [sibling distance=6cm]

child {node {Casi Lindel"of}

child {node {D'ebilmente Lindel"of} [sibling distance=1.5cm]

}

}

;

node[left=of Lin-1-1] (text) {text};

draw[-latex] (Lin) -- (text);

draw[-latex] (text) -- (Lin-1-1);

end{tikzpicture}

end{document}

Or with draw[-latex] (Lin.south west) -- (text);

I would also like to draw your attention to the forest package.

documentclass{article}

usepackage[edges]{forest}

begin{document}

begin{forest}

for tree={edge={-latex},calign=last,l+=5mm,s+=5mm}

 [Lindel"of 

    [text,tier=murmel,alias=l]

    [Casi Lindel"of

       [D'ebilmente Lindel"of,tier=murmel,alias=b]

    ]

 ]

draw[-latex] (l) -- (b);

end{forest}

end{document}

Pure TikZ solution

documentclass[tikz]{standalone}

usepackage[utf8]{inputenc}

usetikzlibrary{positioning}

begin{document}

begin{tikzpicture}

node (lind) {Lindelöf};

node[below=of lind] (casi) {Casi Lindelöf};

node[below=of casi] (debi) {Débilmente Lindelöf};

node[left=of debi] (text) {Text};

draw[-latex] (lind) edge (casi) edge (text);

draw[latex-] (debi) edge (casi) edge (text);

end{tikzpicture}

end{document}

Not knowing if it is good, but TikZ-cd may be an option: I prefer its syntax

documentclass{standalone}

usepackage[utf8]{inputenc}

usepackage{tikz-cd}

usepackage{amsmath}

begin{document}

begin{tikzcd}

& text{Lindelöf}arrow[ldd]arrow[d]\

& text{Casi Lindelöf}arrow[d]\

text{Text}arrow[r] & text{Débilmente Lindelöf}

end{tikzcd}

end{document}

matrix solution

documentclass[tikz]{standalone}

usepackage[utf8]{inputenc}

usetikzlibrary{matrix}

begin{document}

begin{tikzpicture}

matrix[matrix of nodes,row sep=1cm,column sep=1cm] (x) {%

& Lindelöf\

& Casi Lindelöf\

Text & Débilmente Lindelöf\};

draw[-latex] (x-1-2) edge (x-2-2) edge (x-3-1);

draw[latex-] (x-3-2) edge (x-3-1) edge (x-2-2);

end{tikzpicture}

end{document}