MnSymbol-twoheadarrows.tex

\DeclareFontFamily{U}{MnSymbolB}{}
\DeclareFontShape{U}{MnSymbolB}{m}{n}{
    <-6>  MnSymbolB5
   <6-7>  MnSymbolB6
   <7-8>  MnSymbolB7
   <8-9>  MnSymbolB8
   <9-10> MnSymbolB9
  <10-12> MnSymbolB10
  <12->   MnSymbolB12}{}
\DeclareFontShape{U}{MnSymbolB}{b}{n}{
    <-6>  MnSymbolB-Bold5
   <6-7>  MnSymbolB-Bold6
   <7-8>  MnSymbolB-Bold7
   <8-9>  MnSymbolB-Bold8
   <9-10> MnSymbolB-Bold9
  <10-12> MnSymbolB-Bold10
  <12->   MnSymbolB-Bold12}{}
\DeclareSymbolFont{MnSyB}{U}{MnSymbolB}{m}{n}

\DeclareFontFamily{U}{MnSymbolA}{}
\DeclareFontShape{U}{MnSymbolA}{m}{n}{
    <-6>  MnSymbolA5
   <6-7>  MnSymbolA6
   <7-8>  MnSymbolA7
   <8-9>  MnSymbolA8
   <9-10> MnSymbolA9
  <10-12> MnSymbolA10
  <12->   MnSymbolA12}{}
\DeclareFontShape{U}{MnSymbolA}{b}{n}{
    <-6>  MnSymbolA-Aold5
   <6-7>  MnSymbolA-Aold6
   <7-8>  MnSymbolA-Aold7
   <8-9>  MnSymbolA-Aold8
   <9-10> MnSymbolA-Aold9
  <10-12> MnSymbolA-Aold10
  <12->   MnSymbolA-Aold12}{}
\DeclareSymbolFont{MnSyA}{U}{MnSymbolA}{m}{n}

\let\twoheaddownarrow\relax
\DeclareMathSymbol{\twoheaddownarrow}{\mathrel}{MnSyA}{27}
\let\twoheaduparrow\relax
\DeclareMathSymbol{\twoheaduparrow}{\mathrel}{MnSyA}{25}

\let\ntwoheaddownarrow\relax
\DeclareMathSymbol{\ntwoheaddownarrow}{\mathrel}{MnSyB}{27}
\let\ntwoheaduparrow\relax
\DeclareMathSymbol{\ntwoheaduparrow}{\mathrel}{MnSyB}{25}