`dp_mag'
--------

dp_mag(P)
     :: Computes the sum of bit lengths of coefficients of a
     distributed polynomial.

RETURN
     integer

P
     distributed polynomial

   * This function computes the sum of bit lengths of coefficients of a
     distributed polynomial P. If a coefficient is non integral, the
     sum of bit lengths of the numerator and the denominator is taken.

   * This is a measure of the size of a polynomial. Especially for
     zero-dimensional system coefficient swells are often serious and
     the returned value is useful to detect such swells.

   * If `ShowMag' and `Print' for `dp_gr_flags()' are on, values of
     `dp_mag()' for intermediate basis elements are shown.

     [221] X=dp_ptod((x+2*y)^10,[x,y])$
     [222] dp_mag(X);
     115

References
     *Note `dp_gr_flags dp_gr_print': dp_gr_flags dp_gr_print.

