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Fitzhugh-Nagumo equations in a nonhomogeneous medium
In this paper
we investigate various propagation phenomena for the FitzHugh-Nagumo system (%
(4) with a nonhomogeneous threshold function $a(x)$. It is studied
over a range of values $b$, $d,\varepsilon $ and function $a(x).$ Numerical
simulations of system show that system (\ref{fh}) exhibits different
patterns of behavior and they significantly differ from those in a
homogeneous medium.