Originally Posted by

**redsoxfan325** Is there anyway I can display this diagram in LaTeX?

This diagram can be drawn using TikZ (see attachment) :

Code:

\documentclass[a4paper,11pt]{article}
\usepackage{tikz}
\usetikzlibrary{matrix,arrows}
\title{Diagram in \LaTeX}
\date{}
\begin{document}
\maketitle
\centering
\begin{tikzpicture}[description/.style={fill=white,inner sep=2pt}]
\matrix (m) [matrix of math nodes, row sep=2.5em, column sep=2.5em]
{ V & & V\oplus W & & W \\
& & U & & \\ };
\path[->,font=\scriptsize]
(m-1-1) edge node[auto] {$i$} (m-1-3)
(m-1-1) edge node[auto,swap] {$\phi$} (m-2-3)
(m-1-5) edge node[auto,swap] {$j$} (m-1-3)
(m-1-5) edge node[auto] {$\psi$} (m-2-3)
(m-1-3) edge node[auto] {$\alpha$} (m-2-3);
\end{tikzpicture}
\end{document}

If you want to learn how to draw such a diagram I suggest you read this tutorial.