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   Start the Monte Carlo integration.  The result of 
integration is displayed on the screen.
   The adaptive Monte Carlo integrator VEGAS will carry 
out 'Itmx' iterations of integration improving Monte 
Carlo grid after each iteration. See the 'Error' column 
displayed on the screen. The grid optimization is
successful if the 'Error' value does not increase 
from iteration to iteration.
   If the accumulated accuracy of the integration 
is not sufficient, the user can continue calculation. 
The old grid is used in a new integration session.