THE LEONTOVICH BOUNDARY VALUE PROBLEM FOR 
               THE TIME-HARMONIC MAXWELL EQUATIONS

         by H. Ammari, C. Latiri-Grouz and J.-C. N\'ed\'elec

The limiting behavior of the unique solution to Maxwell's equations
in an exterior domain with a Leontovich boundary condition as the 
impedance  tends to zero is investigated. This is accomplished by
reducing the  impedance boundary value  problem for the Maxwell equations
to  a system  of three integral equations. It is shown that the Leontovich 
boundary condition leads to a singular perturbation problem for the Maxwell
equations. A specific numerical treatment is required to achieve a 
sufficient accuracy.

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