\documentclass[a4wide]{article}

\usepackage{amsmath}
\usepackage{amsfonts,amssymb}
\usepackage{psfrag}
\usepackage{graphicx}

\begin{document}
\pagestyle{empty}
\psfrag{Q}{{\Large$\mathbb{Q}$}}
\psfrag{L}{{\Large$\bar\mathbb{Q}$}}
\psfrag{K}{{\Large$\mathbb{K}$}}
\psfrag{A}{{\Large$\mathbb{A}$}}
\psfrag{N}{{\Large$\mathbb{N}$}}
\psfrag{T}{{\Large$\mathbb{T}$}}
\includegraphics{logo.diamond.graph.ps}
\end{document}
