17 \def\sgl{_\mathrm{gl}}

    17 \def\sgl{_\mathrm{gl}}

    18 \def\op{^\mathrm{op}}

    18 \def\op{^\mathrm{op}}

    19 \def\deq{\stackrel{\mathrm{def}}{=}}

    19 \def\deq{\stackrel{\mathrm{def}}{=}}

    20 \def\pd#1#2{\frac{\partial #1}{\partial #2}}

    20 \def\pd#1#2{\frac{\partial #1}{\partial #2}}

    21 \def\lf{\overline{\cC}}

    21 \def\lf{\overline{\cC}}

    22 

    23 

    23 \def\nn#1{{{\it \small [#1]}}}

    24 \def\nn#1{{{\it \small [#1]}}}

    24 \long\def\noop#1{}

    25 \long\def\noop#1{}

    25 

    26 

    26 % equations

    27 % equations