\documentclass[a4paper,10pt]{article}
\usepackage{amsmath}
\usepackage[T1]{fontenc}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Author: Thomas Braun
% begin: fri april 7 2006
% last edit: ""
% License: GPLv2 or later
% 
% all greek letters (small, big, amsmath)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\input{definitions}

\begin{document}
% 
\mathcommand{\alpha}
\mathcommand{\beta}
\mathcommand{\gamma}
\mathcommand{\delta}
\mathcommand{\epsilon}
\mathcommand{\varepsilon}
\mathcommand{\zeta}
\mathcommand{\eta}
\mathcommand{\theta}
\mathcommand{\vartheta}
\mathcommand{\iota}
\mathcommand{\kappa}
\mathcommand{\lambda}
\mathcommand{\mu}
\mathcommand{\nu}
\mathcommand{\xi}
\mathcommand{o}
\mathcommand{\pi}
\mathcommand{\varpi}
\mathcommand{\rho}
\mathcommand{\varrho}
\mathcommand{\sigma}
\mathcommand{\varsigma}
\mathcommand{\tau}
\mathcommand{\upsilon}
\mathcommand{\phi}
\mathcommand{\varphi}
\mathcommand{\chi}
\mathcommand{\psi}
\mathcommand{\omega}
\par
\mathcommand{A}
\mathcommand{B}
\mathcommand{\Gamma}
\pkgs{amsmath}\mathcommand{\varGamma}
\mathcommand{\Delta}
\pkgs{amsmath}\mathcommand{\varDelta}
\mathcommand{E}
\mathcommand{Z}
\mathcommand{H}
\mathcommand{\Theta}
\pkgs{amsmath}\mathcommand{\varTheta}
\mathcommand{I}
\mathcommand{K}
\mathcommand{\Lambda}
\pkgs{amsmath}\mathcommand{\varLambda}
\mathcommand{M}
\mathcommand{N}
\mathcommand{\Xi}
\pkgs{amsmath}\mathcommand{\varXi}
\mathcommand{O}
\mathcommand{\Pi}
\pkgs{amsmath}\mathcommand{\varPi}
\mathcommand{P}
\mathcommand{\Sigma}
\pkgs{amsmath}\mathcommand{\varSigma}
\mathcommand{T}
\mathcommand{\Upsilon}
\pkgs{amsmath}\mathcommand{\varUpsilon}
\mathcommand{\Phi}
\pkgs{amsmath}\mathcommand{\varPhi}
\mathcommand{X}
\mathcommand{\Psi}
\mathcommand{\varPsi}
\mathcommand{\Omega}
\pkgs{amsmath}\mathcommand{\varOmega}

\end{document}