Method Diff

fem/coefficient.cpp:3726–3731

  shared_ptr<CoefficientFunction> Diff (const CoefficientFunction * var,
                                          shared_ptr<CoefficientFunction> dir) const override
  {
    if (this == var) return dir;
    return CrossProduct(c1->Diff(var,dir),c2) + CrossProduct(c1, c2->Diff(var,dir));
  }


  shared_ptr<CoefficientFunction> DiffJacobi (const CoefficientFunction * var, typename BASE::T_DJC & cache) const override