A. Volford et al.
Waves of excitations
The authors are grateful to grants CARNET COPERNICUS Project PL 96-2168, OTKA T-017041, FKFP 0287/1997, OTKA F-22222 for supporting this research.
This paper deals with the propagation of waves around a circular obstacle. The medium is heterogeneous: the velocity is smaller in the inner region and greated in the outer region. The interface separating the two regions is also circlar, and the obstacle is located eccentrically inside it. The different front portraits are classified.