//! and <Dim2>.
//! If DependenceTable(Dimension1,Dimension2) is False
Standard_EXPORT virtual void Hessian (const Standard_Integer Dim1, const Standard_Integer Dim2, math_Matrix& H) = 0;
//! and <Dim2>.
//! If DependenceTable(Dimension1,Dimension2) is False
Standard_EXPORT virtual void Hessian (const Standard_Integer Dim1, const Standard_Integer Dim2, math_Matrix& H) = 0;