Re: [sage-support] Sagemanifolds error in example notebook

[Eric Gourgoulhon]

Le jeudi 8 février 2024 à 13:46:19 UTC+1, Dominic Steinitz a écrit :

I volunteer


Excellent!  Thank you!
Best wishes,

Eric. 

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Re: [sage-support] Sagemanifolds error in example notebook

[Eric Gourgoulhon]

Le jeudi 8 février 2024 à 03:14:14 UTC+1, Matthias Koeppe a écrit :

On Wednesday, February 7, 2024 at 7:00:07 AM UTC-8 Eric Gourgoulhon wrote:

I don't know about any automated way to check that the example notebooks 
are up to date.


One can use "jupyter nbconvert --to notebook --execute" for this
https://nbconvert.readthedocs.io/en/latest/execute_api.html


Thank you for the tip!
Best wishes,

Eric. 

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Re: [sage-support] Re: Sagemanifolds: object has no attribute 'exterior_der'

[Eric Gourgoulhon]

Le jeudi 8 février 2024 à 13:45:18 UTC+1, Dominic Steinitz a écrit :

Sorry about posting the same thing twice.


No problem.
Just for reference, in case someone reads this thread: the answer about the 
connection forms is here:
https://ask.sagemath.org/question/75256/connection-forms-not-anti-symmetric/

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Re: [sage-support] Sagemanifolds error in example notebook

[Dominic Steinitz]

I volunteer

On Wednesday 7 February 2024 at 18:30:22 UTC Eric Gourgoulhon wrote:

> Le mercredi 7 février 2024 à 16:00:07 UTC+1, Eric Gourgoulhon a écrit :
>
> Indeed, this notebook is 8 years old and is not at all up to date (there 
> is even Python 2 print commands in it!).
> Please open an issue at the Github repository hosting this notebook:
> https://github.com/ernestyalumni/Gravite/blob/master/EMsage.ipynb
> in order for the author to update it.  
>
>
> In order to avoid any further confusion, I've temporarily removed the link 
> to this notebook from 
> https://sagemanifolds.obspm.fr/examples.html
>
> Any volunteer for providing a nice example notebook about electromagnetism 
> is welcome!
> To publish it on the above page, make it publicly accessible (i.e.  
> readable via nbviewer.org) and send a pull request to 
> https://github.com/sagemanifolds/WebSite
> (or simply send the ipynb file to me)
>
> Eric.
>
>

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Re: [sage-support] Re: Sagemanifolds: object has no attribute 'exterior_der'

[Dominic Steinitz]

Sorry about posting the same thing twice.

On Wednesday 7 February 2024 at 19:26:32 UTC G. M.-S. wrote:

>
> Just to say that
> https://ask.sagemath.org
> gives me
> 502 Bad Gateway
>
> Guillermo
>
> On Wed, 7 Feb 2024 at 19:35, Eric Gourgoulhon  wrote:
>
>> Le mercredi 7 février 2024 à 15:46:05 UTC+1, Dominic Steinitz a écrit :
>>
>> The example here https://sagemanifolds.obspm.fr/examples.html of 
>>
>>
>>- Electromagnetism in Minkowski spacetime 
>>
>> 
>> [ipynb 
>>
>> ]
>>  
>>(Electromagnetic field 2-form from E and B, Maxwell equations, conserved 
>>current, Lorentz force, Poynting vector)
>>
>> Fails with the error in the title and in more detail below. 
>>
>>
>> For reference: this is discussed in the new thread 
>> https://groups.google.com/g/sage-support/c/yD6k655EWOA/m/3AMzKdpaAQAJ
>>
>> Besides, the question about the connection forms has been answered on   
>> https://ask.sagemath.org/
>>
>> Eric.
>>
>
>

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