Method Diff

fem/coefficient.cpp:3824–3830

template <> 
shared_ptr<CoefficientFunction>
cl_BinaryOpCF<GenericPlus>::Diff(const CoefficientFunction * var,
                                   shared_ptr<CoefficientFunction> dir) const
{
  if (var == this) return dir;
  return c1->Diff(var,dir) + c2->Diff(var,dir);
}

template <> 
shared_ptr<CoefficientFunction>