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Topic: Rubi 4.5 released
Replies: 21   Last Post: Jun 29, 2014 4:29 AM

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Posts: 1,245
Registered: 4/26/08
Re: Rubi 4.5 released
Posted: Jun 27, 2014 1:02 PM
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"Nasser M. Abbasi" schrieb:
> On 6/26/2014 4:47 AM, wrote:

> > Actually, I didn't mean to split the integrand into sooooo many parts;
> Ok, But more parts, means each part is smaller in leaf count. Hence
> it should be easier for a CAS to solve, I would have thought. So
> in this case, the more parts, the better. One pay extra waiting
> time for easier to solve pieces. At least that is what I expected to
> happen ;)

> > what I had in mind was to separate the 9+9 logarithms into 9 terms of
> > 1+1 logarithm (pairing with the corresponding logarithm from the other
> > group serves to keep the integral real), with a tenth term formed by the
> > non-logarithmic remainder. Thus, my second integral covers the (easy to
> > integrate) full remainder, and my third integral the first (relatively
> > hard to integrate) logarithm from each group of nine.
> >

> Will try again and see what I can do.

It does not matter for the non-logarithmic part of the integrand, but
with the logarithmic terms there is the danger that the integrals are no
longer elementary if the algebraic prefactor is taken apart. I just do
not know as I did not investigate this point.


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