Method Diff

fem/coefficient.cpp:5097–5103

  }

  shared_ptr<CoefficientFunction> Diff (const CoefficientFunction * var,
                                        shared_ptr<CoefficientFunction> dir) const override
  {
    if (this == var) return dir;
    return MakeExtendDimensionCoefficientFunction (c1->Diff(var, dir), Array<int> (dims), Array<int> (pos),
                                               Array<int>(stride));
  }

  shared_ptr<CoefficientFunction> DiffJacobi (const CoefficientFunction * var, T_DJC & cache) const override
  {