Changes between Version 1 and Version 10 of Ticket #15504


Ignore:
Timestamp:
04/28/17 06:04:21 (4 years ago)
Author:
rws
Comment:

So I think we can at least relabel this. As the answer is correct it becomes a mere enhancement ticket.

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  • Ticket #15504

    • Property Cc jakobkroeker kcrisman rws added
    • Property Summary changed from Possible integration error to Missing dilog(2) simplification
    • Property Type changed from defect to enhancement
    • Property Milestone changed from sage-6.1 to sage-6.4
  • Ticket #15504 – Description

    v1 v10  
    11From google spreadsheet which no one reads `X-(`
    22
    3 A simple integration error.
    43{{{
    54sage: integrate(log(1+x)/x,x)
     
    98}}}
    109
    11 Both of which are wrong according to 2.728 of Gradshteyn & Ryzhik. Actually the second example is obviously wrong since the integration is a real function over a real interval.
    12 
    13 Should I report the error to Maxima? That seems to be the source.
    14 
    15 PS:
    16 1. The "I" above is not me (ppurka)
    17 2. I am done scrounging through the google spreadsheet for bugs, for now.
     10Since `dilog(2) = -pi^2/4+log(2)^2/2-1/2*(log(2)+I*pi)^2` the result is simply `pi^2/12`.