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.
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