In the user data structure of each vertex a magnetization vector can be stored
magnetization problem is initialized.
The third bit of the control word indicates if the values for the magnetization
vector are valid or not. There are three macros
They work analogously to the corresponding macros for an element's error.
The three components of the magnetization vector are accessible by the macros
All geometrical and numerical data belonging to one vertex are stored in its data structure. Therefore vertex and node are used equivalently. On the contrary Bey's convection-diffusion problem of does distinguish between nodes and vertices: Geometrical and graphical information is stored in the vertices' data structure whereas numerical data are contained in the nodes' data structure.