I don't know how much verbiage to contribute to this notion of
"returning infinity" being open to question.
Just a few notes.
When we say integrate from 0 to infinity, is "infinity" a value? Not
really.
We are asking about the computation of integration from 0 to Z
where Z increases without li
On Sunday, March 12, 2017 at 4:38:41 AM UTC-7, Peleg Michaeli wrote:
>
> > you might simplify infinity-infinityto 0,
> Well, this is the wrong thing here... but sage is smarter than that, I
> believe.
>
>
>>> I truly doubt that. There are presumably many subsystems that can make
this mistake
As it happens, in this case the underlying problem is that we send such
unevaluated integrals to GSL when asked for a numerical approximation,
which can't handle this kind. Raising some kind of error or divergence
notification makes more sense than returning infinity in any case.
--
You recei
> you might simplify infinity-infinityto 0,
Well, this is the wrong thing here... but sage is smarter than that, I
believe.
On Saturday, 11 March 2017 19:09:07 UTC+2, rjf wrote:
>
>
>
> On Wednesday, March 1, 2017 at 2:11:41 AM UTC-8, Peleg Michaeli wrote:
>>
>> Hi,
>>
>> I have two questions,
One other possibility for symbolic systems when the question when
the object in question cannot be simplified or evaluated, is to return
the unsimplified or unevaluated expression.
The simplest case might be something like
is (a>b) which, in the absence of any information
about the values of a
On Wednesday, March 1, 2017 at 2:11:41 AM UTC-8, Peleg Michaeli wrote:
>
> Hi,
>
> I have two questions, one might be thought of as a bug report / feature
> request, please tell me what you think. Trying
> integrate(x, x, 0, infinity)
> raises ValueError: Integral is divergent.
>
> My first ques
Reported in
https://trac.sagemath.org/ticket/22566
and in
https://trac.sagemath.org/ticket/22567
On Thursday, 2 March 2017 11:56:05 UTC+2, Ralf Stephan wrote:
>
> Opening a ticket for bugs is always a good idea.
>
> On Wednesday, March 1, 2017 at 11:11:41 AM UTC+1, Peleg Michaeli wrote:
>>
>> Hi,
Opening a ticket for bugs is always a good idea.
On Wednesday, March 1, 2017 at 11:11:41 AM UTC+1, Peleg Michaeli wrote:
>
> Hi,
>
> I have two questions, one might be thought of as a bug report / feature
> request, please tell me what you think. Trying
> integrate(x, x, 0, infinity)
> raises Val
