\defaultfontfeatures{Ligatures=TeX}
\setmainfont[% main font
	 UprightFont=GFSNeohellenic,
         ItalicFont=GFSNeohellenicIt,
	 BoldFont=GFSNeohellenicBold,
	 BoldItalicFont=GFSNeohellenicBoldIt,	 
          RawFeature=+pnum,% variable width numbers
       WordSpace={0.75,0.75,1},%
       Scale=1.2,%use instead of 12pt 
SmallCapsFeatures={Numbers=OldStyle,WordSpace={0.75,0.75,1},LetterSpace=0.06}]{GFSNeohellenic.otf}
%\renewfontfamily\scshape[%
%	RawFeature=+smcp,RawFeature=+onum,WordSpace={0.75,0.75,1},LetterSpace=0.06,%
%       Scale=1.2%use instead of 12pt 
%]{GFSNeohellenic.otf}
\setmathfont[%
       Scale=1.2%use instead of 12pt 
]{GFSNeohellenicMath.otf}
\renewcommand{\baselinestretch}{1.086} %~1/0.92, use when at 10pt scaled by 1.2
%%%%%%%%% special symbols %%%%%%%%%%%%%%%%%%%%%
%fixes the delimiters so that all big sizes appear. TeX default is 5pt.
% run texdoc mathmode and check the "problems with parentheses" section
%\delimitershortfall=1pt
%\newcommand{\myvarnothing}{\symbol{"E000}}
\let\varnothing\undefined
\let\emptyset\undefined
\AtBeginDocument{
\def\varnothing{\symbol{"E000}}%
\def\emptyset{\symbol{"2205}}}
\DeclareRobustCommand\nrightrightarrows{\mathrel{\char"2B5A}}
\DeclareRobustCommand\nleftleftarrows{\mathrel{\char"2B5B}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\let\bigint\undefined
\DeclareRobustCommand\smallprod{\mathop{\char"2B5E}\nolimits}
\DeclareRobustCommand\smallcoprod{\mathop{\char"2B5F}\nolimits}
\DeclareRobustCommand\smallsum{\mathop{\char"2B60}\nolimits}
\DeclareRobustCommand\smallint{\mathop{\char"2B61}\nolimits}
\DeclareRobustCommand\Bigint{\mathop{\char"2B62}\nolimits}
\DeclareRobustCommand\biggint{\mathop{\char"2B63}\nolimits}
\DeclareRobustCommand\Biggint{\mathop{\char"2B64}\nolimits}
\DeclareRobustCommand\bigggint{\mathop{\char"2B65}\nolimits}
\renewcommand*{\LaTeX}{L\kern-.75ex\raisebox{.7ex}{\textsc{a}}\kern-.1ex\hbox{T}\kern-.4ex\raisebox{-.5ex}{E}\kern-.3exX}