missing right brace about mathjax HOT 5 CLOSED

OK, I tracked this down. First recall that the definition of \eqno that is in use by IEEE is essentially

\def\eqno#1{\tag*{$#1$}}

which was the solution I proposed for them in the discussion we had earlier.

The problem is that the \eqno uses dollar sign delimiters, and that interacts badly with the dollar signs in the \hbox. That is, after the macro replacement, the text is

\tag*{$\hbox{(6$^\prime$)}$}

and so the inner dollar signs cause the contents of the \tag to have two math blocks, \hbox{(6 and )}, both of which have unbalanced braces.

One possible solution would be to use

\def\eqn#1{\tag*{\(# 1\)}}   % space added between # and 1 to prevent autolink to issue 1

instead, so that it uses the alternative math delimiters \(...\) which won't interfere with the inner ones (unless the inner \hbox uses \(...\) as well). Unfortunately there is a problem: a bug in MathJax fails to properly handle the nesting of \(\hbox{$...$}\). It is easily fixed, and I'll make a test branch for the fix shortly, but it's not in the current version, so this redefinition won't work until the bug is fixed. Sigh.

Davide

from mathjax.

OK, I've put my fix for the nesting problem into the issue36 branch of my fork of MathJax for review. The issue was that when a \( delimiter is found and is followed by a $ before the closing \) was found, the matching was switched to the $ rather than continuing to search for \).

This still won't handle the SAME delimiters being nested, but that really shouldn't be occurring anyway.

Davide

from mathjax.

Is the following a correct reduced testcase?

\( \hbox{6$^\prime$} \)

from mathjax.

No, it would need to be

$$\hbox{\(\hbox{6$^\prime$}\)}$$

The nesting problem was when looking for math inside text-mode inside math-mode. It is not a problem with tex2jax, but rather with the treatment of text-mode inside math-mode.

Davide

from mathjax.

OK, thanks.
I've added a reftest

LaTeXToMathML/missing-brace-1.html

==> In testsuite

from mathjax.