## Determination of the reference symmetry axis
of a generally bianisotropic electromagnetic medium
which could be approximately rotationally invariant

**Ludek Klimes**
### Summary

For a given constitutive tensor
of a generally bianisotropic medium,
we estimate to which extent is the medium rotationally invariant
and determine the direction of its reference symmetry axis
in terms of the reference symmetry vector.
If the medium is exactly rotationally invariant,
we obtain its symmetry axis.

### Keywords

Electromagnetic bianisotropy, constitutive tensor,
rotationally invariant medium,
approximately rotationally invariant medium,
reference symmetry axis.

### Whole paper

The paper is available in
PDF (76 kB).

*Seismic Waves in Complex 3-D Structures*, **27** (2017), 127-131
(ISSN 2336-3827, online at http://sw3d.cz).