Dear Sage Developpers,
Great Job on the new release of sage 6.10 yesterday. I tried some
doctesting for some some code I had which was running fine on sage 5.9 and
notice the following issue :
Sage 6.10 produces the following incorrect Output for the .numerator()
function call
sage: u00,u01,u10,u11,a10=var('u00,u01,u10,u11,a10')
sage: (a10 + u10/u00 - u01*u10^2/(u00^2*(u01*u10/u00 - u11)) +
u10*u11/(u00*(u01*u10/u00 - u11))).numerator()
a10*u00^2*u01*u10 - a10*u00^3*u11
sage: (u10/u00 - u01*u10^2/(u00^2*(u01*u10/u00 - u11)) +
u10*u11/(u00*(u01*u10/u00 - u11))).is_zero()
True
Where as Sage 6.9 produced the following correct output for the
.numerator() function call
sage: u00,u01,u10,u11,a10=var('u00,u01,u10,u11,a10')
sage: (a10 + u10/u00 - u01*u10^2/(u00^2*(u01*u10/u00 - u11)) +
u10*u11/(u00*(u01*u10/u00 - u11))).numerator()
a10
sage: (u10/u00 - u01*u10^2/(u00^2*(u01*u10/u00 - u11)) +
u10*u11/(u00*(u01*u10/u00 - u11))).is_zero()
True
I tried on this on 3 separate machine compilation of sage 6.10 and the same
issue creeps up.
I could use advice on work around this bug if it is well known.
Thanks in advance,
Keep up the great work!
Best regards,
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