Method Diff

fem/coefficient_matrix.cpp:631–637

    }

    shared_ptr<CoefficientFunction> Diff (const CoefficientFunction * var,
                                          shared_ptr<CoefficientFunction> dir) const override
    {
      if (this == var) return dir;
      // return DeterminantCF(c1) * InnerProduct( TransposeCF(InverseCF(c1)), c1->Diff(var,dir) );
      return InnerProduct( CofactorCF(c1), c1->Diff(var,dir) );
    }

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