\newcommand{\F}{$ F_{2}(x,Q^2)\:$} 
\newcommand{\Fc}{$ F_{2}\,$}
\newcommand{\FL}{$ F_{L}(x,Q^2)\:$}
\newcommand{\FLc}{$ F_{L}\,$}
\newcommand{\Q}{$ Q^{2}\,$}
\newcommand{\gv}{\,GeV$^2\,$}
\newcommand{\as}{$\alpha_s\,$}
\newcommand{\amz}{$\alpha_s(M_Z^2)\,$} 
\newcommand{\bs}{\overline{s}}
\newcommand{\bc}{\overline{c}}
\newcommand{\bu}{\overline{u}}
\newcommand{\bd}{\overline{d}}
\newcommand{\bb}{\overline{b}}
\newcommand{\bU}{\overline{U}}
\newcommand{\bD}{\overline{D}}
\newcommand{\xbq}{x \overline{q}}  
\newcommand{\xg}{xg(x,Q^2)\,}
\newcommand{\xgc}{xg\,}
\newcommand{\qc}{q\,}
\newcommand{\ipb}{pb$^{-1}\,$} 
\newcommand{\pdff}{$\partial F_{2} / \partial \ln Q^{2}\,$ }
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% commands for HPD
\def\gsim{\mathrel{\rlap{\lower4pt\hbox{\hskip1pt$\sim$}}}}
%\newcommand{\as}{\alpha_s}
\def\MS{\hbox{$\overline{\rm MS}$}}
\def\QMS{Q$_0$\MS}
\newcommand{\xpom}{x_{\mathbb P}}
\newcommand{\degree}{\ensuremath{^\circ}}
\providecommand{\pp}{$p$-$p$}
