Tensor Substitution
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Raphael Seidel
Mar 24, 2020, 7:07:16 AM3/24/20
to sympy
Hello Sympy community,
I am a heavy user of the tensor package and wrote some functions which are missing. However I am not a software developer so you'll need you to excuse my "raw" programming style.
My first self written function is able to factorize Tensor expressions ie. For tensor expression of the type
a(x)b + a(x)c + d
the function returns the list [a,b+c,d]
where the terms b+c and d is factorized recursively even further. I also wrote my own function to print expressions like this since, once you multiply the stuff in the list it goes back to the expanded form.
My second self written function is basically what .subs does but for tensor expressions.
If you would like to have a look a them feel free to send me an e-mail: rapha...@gmail.com
Cheers, Raphael
Aaron Meurer
Mar 24, 2020, 11:56:15 AM3/24/20
to sympy
On Tue, Mar 24, 2020 at 5:07 AM Raphael Seidel <rapha...@gmail.com> wrote:
>
> Hello Sympy community,
> I am a heavy user of the tensor package and wrote some functions which are missing. However I am not a software developer so you'll need you to excuse my "raw" programming style.
>
> My first self written function is able to factorize Tensor expressions ie. For tensor expression of the type
>
> a(x)b + a(x)c + d
>
> the function returns the list [a,b+c,d]
> where the terms b+c and d is factorized recursively even further. I also wrote my own function to print expressions like this since, once you multiply the stuff in the list it goes back to the expanded form.
Can you give an example of such an expression? You can prevent
>
> Hello Sympy community,
> I am a heavy user of the tensor package and wrote some functions which are missing. However I am not a software developer so you'll need you to excuse my "raw" programming style.
>
> My first self written function is able to factorize Tensor expressions ie. For tensor expression of the type
>
> a(x)b + a(x)c + d
>
> the function returns the list [a,b+c,d]
> where the terms b+c and d is factorized recursively even further. I also wrote my own function to print expressions like this since, once you multiply the stuff in the list it goes back to the expanded form.
evaluation with evaluate=False when building the class.
>
> My second self written function is basically what .subs does but for tensor expressions.
we should fix it.
Aaron Meurer
>
> If you would like to have a look a them feel free to send me an e-mail: rapha...@gmail.com
>
> Cheers, Raphael
>
>
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