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Ionizing shock waves in magnetofluiddynamics occur when the
coefficient of electrical conductivity is very small ahead of the
shock and very large behind it. For planar motion of plasma, the
structure of such shock waves are stated in terms of a system of
four dimensional equations. In this paper we shall show that for
the above electrical conductivity as well as for limiting cases,
that is when this coefficient is zero ahead of the shock and/or
is infinity behind it, ionizing fast, slow, Switch-on and
Switch-off shocks admit structure. These mean that physically
these shocks occur.
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