## Frequency-domain ray series for viscoelastic waves
with a non-symmetric stiffness matrix

**Ludek Klimes**
### Summary

In an elastic medium,
it was proved that the stiffness tensor is symmetric with respect
to the exchange of the first pair of indices
and the second pair of indices,
but the proof does not apply to a viscoelastic medium.
In order to indicate which phenomena could be observed
in the wave field if the stiffness matrix were non-symmetric,
we propose the frequency-domain ray series for viscoelastic waves
with a non-symmetric stiffness tensor in this paper.

### Keywords

Viscoelastic media, stiffness tensor, wave propagation,
ray theory, ray series, travel time, amplitude.

### Whole paper

The reprint is available in
PDF (134 kB).

*Stud. geophys. geod.*, **62** (2018), 261-271.