On the left eigenvectors of Stroh matrices

The Stroh formalism is becoming a popular tool in the analysis of surface waves and related phenomena in anisotropic solids and piezoelectrics. It is shown that the left eigenvectors of a nonsymmetric matrix resulting from the Stroh system of equations governing wave motion in anisotropic piezoelectric halfspace, as well as of the analogous Stroh matrix for the electromagnetic case of certain anisotropic media, can be obtained by simple manipulation of its right eigenvectors. This can be helpful in many calculations exploiting the Stroh formalism, for example in evaluation of a functional approximation to the planar harmonic Green´s function of anisotropic media