id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
26844 Derivative of rational functions caruso "I would say that the following is a bug:
{{{
sage: A = PolynomialRing(GF(3), name='t')
sage: K = A.fraction_field()
sage: t = K.gen()
sage: t.derivative(t)
Traceback (most recent call last):
...
ValueError: cannot differentiate with respect to t
}}}
The reason is that the method `derivative` tries to take the derivative of the numerator with respect to the given variable but the variable here lives in the fraction field and not in the polynomial ring.
Should we fix this?" defect closed major sage-duplicate/invalid/wontfix algebra duplicate Marc Mezzarobba N/A