On Thu, Apr 18, 2024 at 08:45:53AM -0700, 'Martin R' via FriCAS - computer
algebra system wrote:
> I started to look into one of the problems
> (https://github.com/sagemath/sage/issues/37813):
>
> res := integrate((x^2+1)^(1/2)/(x^2+(x+(x^2+1)^(1/2))^(1/2)), x);
>
> works nicely, but converting to InputForm (which I use to do the
> translation to sage) fails. Is there a good reason for that - i.e., is
> this a bug, or just a problem with memory?
>
> Best wishes,
>
> Martin
>
> (2) -> inform := res :: INFORM
>
> Heap exhausted during garbage collection: 0 bytes available, 16 requested.
<snip>
> Total bytes allocated = 1072734880
> Dynamic-space-size bytes = 1073741824
For me it works. The result is big for humans, but should be no
problem for modern computers. I am using FriCAS trunk build
using sbcl-1.2.4 (currently with 3Gb limit). Tried also version
with 2Gb limit and sbcl-2.2.9 with 1Gb limit. Note
I did:
res := integrate((x^2+1)^(1/2)/(x^2+(x+(x^2+1)^(1/2))^(1/2)), x);
ii := res::InputForm;
that is I am _not_ printing resulting InputForm. But I also
separately printed the InputForm, it works, just is slow when
printing to terminal and useless because the result is much
bigger than terminal scrollback buffer.
--
Waldek Hebisch
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