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- 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
-
section
dp_gr_flags, dp_gr_print.
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