There are several integrators in SymPy. The latter form is produced by ratint.
>>> from sympy.integrals.rationaltools import ratint >>> from sympy.abc import t >>> ratint(1/(4*(-t + 4)), t) -log(t - 4)/4 Kalevi Suominen On Monday, September 19, 2016 at 5:06:22 AM UTC+3, Raphael Timbó wrote: > > Since the images with the results are distorted: > > First result: > > -(1/4)*log(4*t - 16) > > Results given by the step-by=step solution on sympy gamma: > > -(1/4)*log(-t + 4) > > > > On Sunday, September 18, 2016 at 3:18:31 PM UTC-3, Raphael Timbó wrote: >> >> Hi, >> I was trying to use: >> integrate(Rational(1,4)*(1/(4-t))) >> >> This was returning: >> −14log(4t−16) >> >> I was not expecting this result... I went to sympy gamma to see the steps >> and I saw that: >> >> Antiderivative forms: >> <http://gamma.sympy.org/input/?i=integrate%28Rational%281%2C4%29*%281%2F%284-t%29%29%29#integral_alternate_fake> >> >> - integrate(1/(4*(-t + 4)), t) >> −14log(4t−16) >> >> >> But when you check the steps you have: >> >> The answer is: >> >> −14log(−t+4)+constant >> >> >> >> >> >> I could not understand why the results are different... >> Any explanation? >> >> Thank you! >> >> -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/1629e59a-4d35-4927-89fc-0f3a94a3fd86%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
