Sorry, I haven't. I don't know how. On Monday, June 23, 2014 8:38:46 AM UTC-4, Dima Pasechnik wrote: > > On 2014-06-23, Karl Schultheisz <art.l...@gmail.com <javascript:>> wrote: > > I'm using Sage 6.2 on Arch Linux. I have posted before about sums being > > wrong > ><https://groups.google.com/d/msg/sage-support/IgC78rcdO7c/qTWzpA9f-P8J>, > > and I am happy to see that the community took action. Thanks! I have > been > > seeing other errors that may or may not be related to those addressed in > > the link above. > > > > I open a new Sage session (command line). The following code ought to > > return (e^x - 1)/x. > > > > sage: k = var('k') > > sage: sum(x^k/factorial(k+1),k,0,oo) > > 1/4*sqrt(pi)*sqrt(x)*e^(1/2*x) > > > > This looks similar to the sort of nonsense it was spitting out when > misinterpreting > > Bessel functions from Maxima <http://trac.sagemath.org/ticket/16224>. > In > > the same session, if I run the summation command again, the result is > > did you try applying the patch from #16224 ? > > > different. > > > > sage: sum(x^k/factorial(k+1),k,0,oo) > > sum(x^k/factorial(k + 1), k, 0, +Infinity) > > > > And after this it will not simplify any sums, even ones it would have > done > > correctly on the first try: > > > > sage: sum(x^k/factorial(k),k,0,oo) > > sum(x^k/factorial(k), k, 0, +Infinity) > > > > Even a reset doesn't help. (As a side-note, the exit command doesn't > > survive reset.) > > > > sage: reset() > > sage: k = var('k') > > sage: sum(x^k/factorial(k),k,0,oo) > > sum(x^k/factorial(k), k, 0, +Infinity) > > sage: exit > > > > > --------------------------------------------------------------------------- > > NameError Traceback (most recent > call > > last) > > /opt/sage/local/lib/python2.7/site-packages/sage/all_cmdline.py in > ><module>() > > ----> 1 exit > > > > NameError: name 'exit' is not defined > > > > Finite sums seem to be ok. > > > > sage: sum(x^k,k,0,3) > > x^3 + x^2 + x + 1 > > sage: m = var('m') > > sage: sum(x^k,k,0,m) > > (x^(m + 1) - 1)/(x - 1) > > > > Any help is greatly appreciated. > > > >
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