# [texhax] binary symbol needed

Barbara Beeton bnb at ams.org
Wed Aug 12 22:57:08 CEST 2009

```gerree,

I'm in need of a binary symbol called
interior product ... I have searched through the many
manuals ... could not locate it ... standard math symbol?

this symbol exists in unicode; see the
chart at
http://www.unicode.org/charts/PDF/U2A00.pdf
where it appears in position 2A3C.  (some
mathematicians prefer the upright leg to be
longer than the one on the bottom; that's
a recognized variant.)

however, i don't know of current availability
in any tex font, although this is being worked
on.  for the present, i suggest hacking it
together from a vertical and a horizontal line
in a box, making that \mathbin, and calling it
\intprod (that's what it will be called in the
stix font, once latex support is created).