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          and the last equation simply requires that




          (which  is equivalent  to the  observation, from (5.100c), that  there is no boundary-
          layer structure in the solution for  The first two equations, (5.104a,b), give an
          equation for





          which can be integrated once (by setting       to give






          where A is an arbitrary constant. Sadly, we cannot integrate once again (so a numerical
          approach might be considered), but we can make a few observations.
            The boundary condition on X = 0 becomes    and, in addition, the match-
          ing condition is satisfied if





          (see (5.102c) which requires the choice




          (It is left as an exercise to show that there is a solution for which





          However, more success in the development of useful analytical detail is possible if we
          use (5.104a,b) to produce an equation for





          One integration then produces the result





          where the arbitrary constant must, in order to satisfy the matching condition at infinity,
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