// From code.ys.def:
OMDef( "Complex"  , "complex1","complex_cartesian" );
OMDef( "Re"       , "complex1","real"              );
OMDef( "Im"       , "complex1","imaginary"         );
OMDef( "Conjugate", "complex1","conjugate"         );
OMDef( "Arg"      , "complex1","argument"          );
OMDef( "IsComplex", "yacas","is_complex"           );
