LaTeX code for this diagram

Question

What would be the LaTeX code for the diagram below?
I have attached my code:
documentclass[10pt,a4paper]{article}
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}
usepackage{amsmath}
usepackage{amsfonts}
usepackage{amssymb}
usepackage{graphicx}
begin{document}
begin{eqnarray}label{cdofNLalgebra}
    setlength{unitlength}{1cm}
    begin{array}{l}
        begin{picture}(4,2.6)
            put(1.4,2.3){$X$}
            put(1.7,2.4){vector(1,0){2.3}}
            put(4.1,2.3){$Y$}
            put(4.1,2.2){vector(0, -1){1.8}}
            put(4.2,1.2){$pi_2$}
            put(3.6,0.0){$G(T)$}
            put(1.7,2.3){vector(1,-1){2.0}}
            put(2.3,1.2){$pi_1$}
        end{picture}
    end{array}
end{eqnarray}
end{document}

Alenanno · Accepted Answer

You can also use tikz-cd.
Output

Code
documentclass[tikz, margin=10pt]{standalone}

usepackage{tikz-cd} % if tikz is already loaded, you can also use usetikzlibrary{cd}

begin{document}
    begin{tikzcd}[row sep=2cm]
        & G(T) arrow{dl}[swap]{pi_1} arrow[leftrightarrow]{dr}{pi_2} & 
        X arrow[rr] arrow[ur, bend right=15,dashrightarrow] & & Y 
    end{tikzcd}
end{document}

gmvh · Answer

It looks like you want to draw a commutative diagram of some sort. There are packages which make this quite easy, e.g. diagxy or xymatrix.

js bibra · Answer

Just a general example of doing such like drawings-- if you want you can increase the bend angle of the arrow in the preamble

documentclass[tikz, margin=3.14159mm]{standalone}
usetikzlibrary{arrows.meta,
                calc,
                positioning,
                quotes}

begin{document}
    begin{tikzpicture}[
node distance = 35mm,
vertex/.style = {text width=3.2em, align=center},
every edge/.style = {-Straight Barb, draw, semithick},
bend angle=15 % <---
                  ]
%
node (B) [vertex]  { $X$};
node (C) [vertex, right=of B]  { $Y$};
node (A) [vertex, above=of $(B.north)!0.5!(C.north)$] { $G(T)$};
%
draw   (A) edge ["$pi_1$" ']  (B)
        (B) edge [bend right, dashed]    (A) 
        (C) edge [<->, "$pi_2$" ']   (A) 
        (B) edge []  (C); 
    end{tikzpicture}
end{document}

LaTeX code for this diagram

3 Answers

Output

Code

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