  This technical report yields detailed calculations of the paper [1] (B.
Bid\'egaray-Fesquet, "Stability of FD-TD schemes for Maxwell-Debye and
Maxwell-Lorentz equations", Technical report, LMC-IMAG, 2005) which have been
however automated since (see
http://ljk.imag.fr/membres/Brigitte.Bidegaray/NAUtil/). It deals with the
stability analysis of various finite difference schemes for Maxwell--Debye and
Maxwell--Lorentz equations. This work gives a systematic and rigorous
continuation to Petropoulos previous work [5] (P.G. Petropoulos.,"Stability and
phase error analysis of FD-TD in dispersive dielectrics", IEEE Transactions on
Antennas and Propagation, 42(1):62--69, 1994).
