On Sun, 12 Dec 2010, Procházka Lukᨠwrote:

> Hello, thanks for the deeper explanation -
>
> On Sat, 11 Dec 2010 17:28:55 +0100, Aditya Mahajan <adityam@umich.edu> wrote:
>
>> I agree that digits, upper and lower case latin and greek does not capture
>> all mathematic characters for which such mappings are needed. Similar
>> mappings might also be needed for some symbols like nabla (are there other
>> such symbols?). These can also be added as a key like
>>
>>     nabla={normal,italic}
>> 
>> or
>>
>>     nabla={bold,normal}
>
> I came to work with some similar operators in differential geometry, so as I 
> remember or I can find:
>
> grad (also horizontally flipped greek Delta)
> div (looking like normal greek Delta)
> curl, rot - the same as div (but in R3 space, whilst div is for R1)
> Laplace operator

Unlike Nabla, these characters do not have any bold or sans-serif 
variants, so it does not make sense to define math-mappings for them.

The only other character that I could find with multiple alternatives is 
the partial symbol. So, I suggest the following macro:

\definemathmappings % and \setupmathmappings
      [....]
      [digits=...,
       uclatin=....,
       lclatin=....,
       ucgreek=...,
       lcgreek=...,
       nabla=...,
       partial=...]

Other symbols (blackboard sum, differential operator, etc) are better 
handled by a dedicated macro rather than input mappings.

If there are no other concerns, Hans, Mojca, and I can take this offline.

Aditya