Hi Stefan,

On Sunday, May 27, 2012 5:49:35 AM UTC-4, Stefan Krastanov wrote:
>
> I am asking for feedback on your preferences for a naming convention: 
> How would you like to name (**not** print) the basis vectors (d/dx, 
> d/dy) and the basis forms (dx, dy). 
>
> For the forms I suppose it is clear: dx and dy (dr, dtheta, etc). And 
> printing them will give the same thing (in pprint unicode, latex, 
> etc). 
>
> Here vectors mean directional derivative operators: 
> However base vectors are a bit less obvious. In latex they will be 
> \frac{\part}{\part x}, as in pprint unicode, however how to print/name 
> them in simple python ascii? 
>
> `d_dx` or `e_x` or `X` or `u_x` or `vx` ...? 
>
> I prefer `d_dx` for the moment. `e_x` and `u_x` are not that bad too. 
> I dislike `X` as it is too close to `x` which is the coordinate 
> function. 
>
> For the moment I will proceed with `d_dx`. Any changes will happen in 
> future pull requests. 
>

I vote for  ' e_x' .  For me, d_dx is too reminiscent of derivative with 
respect to x.  But hey, it is probably not that important assuming one gets 
used to the notation.

Comer

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