mathematica_free error

[rodrigos...@gmail.com]

Good afternoon,

In this worksheet, the algorithm mathematica_free of integrate returns the following error:

Error in lines 2-2 Traceback (most recent call last): File "/cocalc/lib/python3.9/site-packages/smc_sagews/sage_server.py", line 1230, in execute exec( File "", line 1, in <module> File "sage/symbolic/expression.pyx", line 13138, in sage.symbolic.expression.Expression.integral (build/cythonized/sage/symbolic/expression.cpp:95197) return integral(self, *args, **kwds) File "/ext/sage/9.5/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/symbolic/integration/integral.py", line 1047, in integrate return integrator(expression, v, a, b) File "/ext/sage/9.5/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/symbolic/integration/external.py", line 127, in mma_free_integrator all_outputs = parse_moutput_from_json(json_page_data) File "/ext/sage/9.5/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/interfaces/mathematica.py", line 1235, in parse_moutput_from_json raise ValueError('json object contains no pods') ValueError: json object contains no pods

Why is this happening?

[Emmanuel Charpentier]

I have had similar problems. Wolfram may have changed (again !) something in their output format... Since I know zilch about HTML mysteries and miseries, I can't offer anything but my warmest condolences...

[Dima Pasechnik]

On Sat, Feb 19, 2022 at 12:54 PM Emmanuel Charpentier
<emanuel.c...@gmail.com> wrote:
>
> I have had similar problems. Wolfram may have changed (again !) something in their output format... Since I know zilch about HTML mysteries and miseries, I can't offer anything but my warmest condolences...

By the way, has anyone tried https://www.wolfram.com/engine/ ?
We can think of making an interface to it, as it's a free and locally
installable.

Dima

>
> Le lundi 14 février 2022 à 17:17:20 UTC+1, rodrigos...@gmail.com a écrit :
>>
>> Good afternoon,
>>
>> In this worksheet, the algorithm mathematica_free of integrate returns the following error:
>>
>> Error in lines 2-2 Traceback (most recent call last): File "/cocalc/lib/python3.9/site-packages/smc_sagews/sage_server.py", line 1230, in execute exec( File "", line 1, in <module> File "sage/symbolic/expression.pyx", line 13138, in sage.symbolic.expression.Expression.integral (build/cythonized/sage/symbolic/expression.cpp:95197) return integral(self, *args, **kwds) File "/ext/sage/9.5/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/symbolic/integration/integral.py", line 1047, in integrate return integrator(expression, v, a, b) File "/ext/sage/9.5/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/symbolic/integration/external.py", line 127, in mma_free_integrator all_outputs = parse_moutput_from_json(json_page_data) File "/ext/sage/9.5/local/var/lib/sage/venv-python3.9.9/lib/python3.9/site-packages/sage/interfaces/mathematica.py", line 1235, in parse_moutput_from_json raise ValueError('json object contains no pods') ValueError: json object contains no pods
>>
>> Why is this happening?
>

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[Priyanshu Rai]

I have to use Mathematica as a part of a University course and I use Sagemath side-by-side because of its huge ecosystem. Although my University has the license for Mathematica Desktop, I'll make sure to give it a try, this looks promising.

[Emmanuel Charpentier]

Le dimanche 20 février 2022 à 11:24:51 UTC+1, dim...@gmail.com a écrit :

On Sat, Feb 19, 2022 at 12:54 PM Emmanuel Charpentier
<emanuel.c...@gmail.com> wrote:
>
> I have had similar problems. Wolfram may have changed (again !) something in their output format... Since I know zilch about HTML mysteries and miseries, I can't offer anything but my warmest condolences...

By the way, has anyone tried https://www.wolfram.com/engine/ ?
We can think of making an interface to it, as it's a free and locally
installable.

[ Sorry for the late answer : I moved (only a couple miles, bit that's still a quarter of a century of life...), and I managed to dig up my computer from the resulting mess only this morning... :-) ]

Yes, yes, yes : easy comparison to Wolfram's (Mathematica's) result may be important in various contexts (and may offer a solution where none of Sage's tools works, e. g. various primitive search problems).

A "nice" presentation could be, like our current Mathematica interface,  a standard package compilable without Wolfram Engine having to be present on the target machine, giving an informative error message if called on a machine without the engine, but giving back the expected result if present.

The documentation should include (a pointer to) instructions on how to install the Wolfram engine.

That could revive my log of untranslatable Mathematica results, for which I have some proposals (but didn't bother to formally file, since enhancing access to a non-free product may not be a priority...). If something gratis, not (too much) encumbered and not-too-hard to install  can  be obtained without too much hassle, that should become a priority.

[Henri Girard]

Jupyter notebook works with wolfram engine 13 on ubuntu (gwls2 and ubuntu22.04 i am using), but maybe it shouldn't be difficult to adapt it ?

I am not good enaugh for this but I think we are on a near way ?

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[rodrigos...@gmail.com]

No, I haven't tried it.

[Henri Girard]

One of the best idea by these gray days of life

I jupyter/python it works fine, but some pic like 3d stay unanimated, that would be fine to succeed to do it in sage ?

One can use cloud, but would be better to get it working in local sage.

Anyway it is the best to try mathematica (today I prefer sagemath lol)  but both are interesting

Henri

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