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diff --git a/Master/texmf-dist/doc/generic/FAQ-en/html/FAQ-dolldoll.html b/Master/texmf-dist/doc/generic/FAQ-en/html/FAQ-dolldoll.html deleted file mode 100644 index 492e01c31cd..00000000000 --- a/Master/texmf-dist/doc/generic/FAQ-en/html/FAQ-dolldoll.html +++ /dev/null @@ -1,32 +0,0 @@ -<head> -<title>UK TeX FAQ -- question label dolldoll</title> -</head><body> -<h3>Why use <code>\</code><code>[</code> …<code>\</code><code>]</code> in place of <code>$$</code> …<code>$$</code>?</h3> -<p/>LaTeX defines inline- and display-maths commands, apparently -s those that derive from the TeX primitive maths -sequences bracketing maths commands with single (or pairs of) dollar signs. -<p/>As it turns out, LaTeX’s inline maths grouping, -<code>\</code><code>(</code><code> ... </code><code>\</code><code>)</code>, has precisely the same effect as the -TeX primitive version <code>$ ... $</code>. (Except that -the LaTeX version checks to ensure you don’t put <code>\</code><code>(</code> and -<code>\</code><code>)</code> the wrong way round.) -<p/>In this circumstance, one often finds LaTeX users, who have some -experience of using Plain TeX, merely assuming that LaTeX’s -display maths grouping <code>\</code><code>[</code><code> ... </code><code>\</code><code>]</code> may be replaced by -the TeX primitive display maths <code>$$ ... $$</code>. -<p/>Unfortunately, they are wrong: if LaTeX code is going to patch display -maths, it can only do so by patching <code>\</code><code>[</code> and <code>\</code><code>]</code>. The most -obvious way this turns up, is that the class option <code>fleqn</code> -simply does not work for equations coded using -<code>$$ ... $$</code>, whether you’re using the standard classes -alone, or using package <i>amsmath</i>. Also, the <code>\</code><code>[</code> and -<code>\</code><code>]</code> construct has code for rationalising vertical spacing in some extreme -cases; that code is not available in <code>$$ ... $$</code>, so if you -use the non-standard version, you may occasionally observe -inconsistent vertical spacing . -<p/>There are more subtle effects (especially with package -<i>amsmath</i>), and the simple rule is “use -<code>\</code><code>[</code><code> ... </code><code>\</code><code>]</code> whenever displayed maths is needed in -LaTeX”. -<p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=dolldoll">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=dolldoll</a> -</body> |