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<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/TR/xhtml1/transitional"
>
<head><title>common sources of
problems</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="generator" content="TeX4ht (http://www.cis.ohio-state.edu/~gurari/TeX4ht/mn.html)" />
<!--xhtml,th4,index-->
<meta name="src" content="mn.tex" />
<meta name="date" content="2001-02-28 17:02:00" />
<link rel="stylesheet" type="text/css" href="mn.css" />
</head><body
>
<a
name="index17-18009"></a><p align="right"
class="rightline"><a
href="mn3.html#mn17.html" >up</a></p>
<h3 class="SubSectionHead"><a
name="QQ1-17-19"></a>Some Sources of Problems for MathML</h3>
<!--l. 2713--><p class="noindent">
</p><ol type="a" >
<li>Broken math formulas, such as ‘<span
class="cmtt-10">$R=\{x|x$ is real $\}$</span>’ instead of ‘<span
class="cmtt-10">$R=\{x|x \mbox{ is real } \}$</span>’.
</li>
<li>Math mode employment for presenting nonmath content, such as ‘<span
class="cmtt-10">$$\vbox{...}$$ </span>’ instead of
‘<span
class="cmtt-10">\begin{center}\vbox{...}\end{center}</span>’. </li>
<li>Unmatched parentheses within entries of arrays, such as ‘<span
class="cmtt-10">\begin{array}...(... & ...)...\end{array}</span>’ instead
of ‘<span
class="cmtt-10">\begin{array}...\mathrel( ... & ...\mathrel)...\end{array}</span>’. </li>
<li>Incorrect annotation of delimiters, such as ‘<span
class="cmtt-10">\bigl\{...\bigr|...\bigr\}</span>’ instead of ‘<span
class="cmtt-10">\bigl\{...\bigg|...\bigr</span>’
</li>
<li>Empty bases for subscripts and superscripts, such as ‘<span
class="cmtt-10">{}^{...}, {}_{...}</span>’ instead of ‘<span
class="cmtt-10">{\csname</span>
<span
class="cmtt-10">HCode\endcsname{}}^{...}, {\csname HCode\endcsname{}}_{...}</span>’. </li>
<li>Modifications to system commands outside the eyes of TeX4ht, such as ‘<span
class="cmtt-10">\c.{\cdot}</span>’ </li>
<li>Use of the operators ‘<span
class="cmtt-10">^</span>’ and ‘<span
class="cmtt-10">_</span>’, instead of ‘<span
class="cmtt-10">\sb</span>’ and ‘<span
class="cmtt-10">\sp</span>’, not under the presence of tex4ht (tex4ht becomes active
only at the ‘<span
class="cmtt-10">\begin{document}</span>’ command.)
</li></ol>
</body></html>
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