[XeTeX] Triangles

[Barbara Beeton]

will,

    I have some triangle queries:

    My STIX table tells me to call U+25B3 \bigtriangleup and U+25B5
    \vartriangle. But I'm missing a unicode symbol for just "\triangle".

    Disregarding the difference in size between Cambria's and STIX's U+25B3,
    would it be appropriate to call U+25B3 "\triangle" as well as its more
    descriptive name \bigtriangleup? Or have I missing a glyph somewhere?

this is essentially a tex question.
here are the definitions of \triangle
and \bigtriangleup from plain.tex :

  \mathchardef\triangle="0234
  \mathchardef\bigtriangleup="2234

they are the same glyph, differing only
in the class; \triangle is "ord", while
\bigtriangleup is a binary operator.
i chose the name \bigtriangleup rather
then \triangle for the stix collection
since it is a pair with \bigtriangledown.

although the utc has softened its stance
on multiple codes with the same shape,
i'm not sure that it has softened this
much.
						-- bb