On 23/04/2018 19:35, Marc Mezzarobba wrote:
John Cremona wrote:
This is simpler than writing numerator and denominator as a rational
times a primitive integral polynomial, though that is probably what
users would prefer.
And (at least in my limited experience), for rational fractions over
general fraction fields (things like ℚ(x)(y), say), normalizing by
extracting the contents can be very slow.
That does not prevent us to normalize for let say: __repr__() ,
numerator(), denominator(). Is there any reasonable rule to choose when
to and when not to normalize? For QQ itself, GMP does normalize all the
time.
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