Please keep discussions on this mailing list civil. Everyone who posts on this list is expected to follow the SymPy code of conduct https://github.com/sympy/sympy/blob/master/CODE_OF_CONDUCT.md.
Convergence conditions returned by summation() and integrate() are not guaranteed to be tight. That is why the "otherwise" condition is the unevaluated sum/integral. It is possible for values outside of the given condition will still produce a convergent result. Aaron Meurer On Sun, Aug 23, 2020 at 10:02 PM first last <[email protected]> wrote: > > There's a lot of literature about logic out there that no one who's designed > a CAS has read. A good CAS would take no more work to make than the > contemporary CAS's, which as a class are the worst made software I've ever > used extensively in my fifty years. Euclid wrote a crystal clear manual 2,500 > years ago, but you clowns couldn't manage it. > > On Sun, Aug 23, 2020 at 7:49 PM [email protected] > <[email protected]> wrote: >> >> This again: >> >> sympy.summation(sympy.S('z^k / k'), sympy.S('(k, 1, oo)')) >> Piecewise((-log(1 - z), (z >= -1) & (z < 1)), (Sum(z**k/k, (k, 1, oo)), >> True)) >> >> I don't know what ">=" and mean "<", since Sympy (a program about math) was >> documented by a non-mathematician who neglected to define his mathematical >> terms; but it looks a lot like Sympy is singling out a segment of the real >> line instead of a disk in the complex plane. This program was designed from >> the ground up by amateurs not up to the task. >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "sympy" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/sympy/28qmAIL3Xro/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/e5896cd0-adf1-4447-94df-0c75b63c209an%40googlegroups.com. > > -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/CABc8mQWU2mkO2wOe_vHDdUJ8jP2ZJ7s_Rg1fY5cVyXBV-VmUgA%40mail.gmail.com. -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6%2BNE2YV73De03xXUo7u3A%3D3Xun3Roh0P_285cJa-e3CzQ%40mail.gmail.com.
