Symmetry: about
Symmetries attached to the study domain
If the model device is characterized by possible symmetries, those can be attached to the study domain.
The boundary conditions on the corresponding boundaries are imposed in the Physical module.
Symmetry axes: 2D domain
The symmetry axes can be:
 either axes parallel (X, Y) to the main axes (OX, OY)
 or an tilted axis that forms an angle with the main axis OX and passing by the origin of the coordinate system of the study domain
Symmetry axis

Symmetry axis

Symmetry planes: 3D domain
The symmetry planes can be:
 either planes parallel to the main planes (XOY, YOZ, XOZ)
 or tilted planes passing through one of the main axis (OX, OY, OZ)
Symmetry plane

Symmetry plane

Symmetry and infinite box
It is possible to combine infinite box and symmetries. In this case, the geometry of the infinite box (points and lines) automatically follows the symmetries attached to the study domain.
The rules to be respected are presented in the table below.
Domain  Rule 

2D  the axes of symmetry have to correspond to the main axes of the coordinate system of the study domain (X and Y) 
3D  the planes of symmetry have to correspond to the main planes of the coordinate system of the study domain (XOY, YOZ and ZOX) 
Example: 2D domain
The examples of the infinite box geometry for the study domain with no symmetry and with the symmetries are presented in the table below.
no symmetry  symmetries 

Complete infinite box of disk type  A quarter of the infinite box of disk type for symmetries versus X and Y axis 
Example: 3D domain
The examples of the infinite box geometry for the study domain with no symmetry and with the symmetries are presented in the table below.
no symmetry  symmetries 

Complete infinite box of parallelepiped type  A quarter of the infinite box of parallelepiped type for symmetries versus XY plane, YZ plane and ZX plane 