Aditya Mahajan wrote:
On Fri, Nov 13, 2009 at 4:03 AM, Mojca Miklavec <
mojca.miklavec.li...@gmail.com> wrote:
Hello,
I have tried to compile an old document (written in mkii times). Among
other problems that I yet need to isolate, the following minimal
example doesn't want to compile: $\bigl| x \bigr>$ since <|> aren't
recognized as candidates for delimiters. There is a workaround of
course (using \langle, \rangle, ... instead of <>), but the three
characters are just way too handy to use.
| works fine here. < and > don't. I did not know that \left< is equivalent
to \left\langle even in plain tex.
I suppose that the behaviour in mkii comes from these lines:
\definemathcharacter [<] [nothing] [sy] ["68] [ex] ["0A]
\definemathcharacter [>] [nothing] [sy] ["69] [ex] ["0B]
I guess mkii is imitating plain tex here. (Though, I could not find how this
is happening in plain tex)
From plain.tex:
\mathcode`\<="313C
\delcode`\<="26830A
The first (\mathcode) controls standalone use, the second (\delcode)
use as a delimiter. Both can be set at the same time, and that second
one got lost in the conversion, probably because it has a dedicated
slot in Unicode (U+0x27E8, MATHEMATICAL LEFT ANGLE BRACKET).
Perhaps this can be done with the mathspec field in char-def.lua, but
I do not know how?
Best wishes,
Taco
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