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   After this menu  call the result of integration
 and histogram information is deleted and does not
 contribute to subsequent results.
   The results obtained by first iterations are
 bad, because a bad grid is used. After several
 iterations VEGAS has built the best Monte Carlo
 grid for the integrand. As a result the error of
 integration for one iteration does not decrease
 any more. It is reasonable in this point to start
 the integration from the beginning.
