>
> A note on the differnece that my patch made to mapleok.output:
>
> in1638a, in1720a, in1856a,in1863a,in1872a suffers the limit
> bug I mentioned in the other thread. Because the diff includes
> "log", which shouldn't be.
The limit problem is because of complex values. Currently
indefinite integrator poduces alternative results because
it can not decide which one is real. And definite integrator
is not smart enough to realize which variant to use.
AFAICS the change to 'atan' term is OK those examples.
The actual problem is that definite integrator should
not attempt to use 'atan' variants for this integral
(in different interval 'atan' variants would be OK,
so it job of definite integrator to eliminate them).
> in1721a: the difference is very small, merely sqrt(I-1) vs. (I-1)/sqrt(I-1)
>
> in2108a: trival, tan(a/b) vs. -tan(b/a), 2 paris.
>
> in249a: fixes a bug, the patch makes it correct.
>
> BTW, about the time consuming, this patch doesn't
> increase the time of "make integ.output mapleok.output".
>
> So I think this patch improves result for some input
> while not make it worse for others.
Yes.
--
Waldek Hebisch
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