Re: \triangledown placed too low in Palatino

[Aditya Mahajan <adityam@umich.edu>]

On Fri, 11 Apr 2014, Sanjoy Mahajan wrote:

>> I cannot say whether the wrong placement is due to the wrong font
>> metrics or the wrong mapping (mathop vs mathord) by ConTeXt.
>
> I tried '\triangle T' (often used as the Laplacian operator, instead of
> writing it out as \nabla^2).  That one comes out fine, even though
> \triangledown does not.  But they seem to have similar kinds of
> defintions/mappings:
>
> From luatex-math.tex :
>
> \def\triangle                  {\Umathchar  "0"0"0025B3 }
> \def\triangledown              {\Umathchar  "2"0"0025BD }
>
> So it must be a wrong font metric?

AFAIU, ConTeXt does not use luatex-math.tex. The mappings are defined in 
char-def.lua.

triangle is defined as a mathord (like nabla) while bigtriangleup is a 
mathop (like triangledown).

Aditya
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