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index 57edaa32534..c49e8968f3d 100644
--- a/Master/texmf-dist/doc/generic/FAQ-en/html/FAQ-numbersets.html
+++ b/Master/texmf-dist/doc/generic/FAQ-en/html/FAQ-numbersets.html
@@ -2,21 +2,23 @@
<title>UK TeX FAQ -- question label numbersets</title>
</head><body>
<h3>Symbols for the number sets</h3>
-<p/>It is a good idea to have commands such as <code>\</code><code>R</code> for the real numbers and
+<p/>Mathematicians commonly use special lettering for the real numbers and
other standard number sets. Traditionally these were typeset in bold.
Because, in the ordinary course of events, mathematicians do not have
-access to bold chalk, they invented the special symbols that are now
-often used for <code>\</code><code>R</code>, <code>\</code><code>C</code>, <em>etc</em>. These symbols are known
-as &ldquo;blackboard bold&rdquo;. Before insisting on using them, consider
-whether going back to the old system of ordinary bold might not be
-acceptable (it is certainly simpler).
+access to bold chalk, they invented special symbols that are now
+often used for the number sets; these symbols are known as
+&ldquo;blackboard bold&rdquo; (or double-stroked fonts); in place of the heavier
+strokes of a bold font, (some) strokes of the letters are doubled.
+The minimum useful set is upper-case letters &lsquo;I&rsquo;, &lsquo;N&rsquo;, &lsquo;R&rsquo;, &lsquo;Q&rsquo; and
+&lsquo;Z&rsquo;; some fonts offer a figure &lsquo;1&rsquo; (for a unit matrix &mdash; not a number
+set at all).
<p/>A set of blackboard bold capitals is available in the AMS
<i>msbm</i> fonts (<i>msbm</i> is available at a range of
-design sizes, with names such as <i>msbm10</i>). The pair of font
+design sizes, with names such as <i>msbm10</i>). The pair of font
families (the other is called <i>msam</i>) have a large number of
-mathematical symbols to supplement the ones in the standard TeX
-distribution, and are available in Type 1 format with most modern
-distributions. Support files for using the fonts, both under
+mathematical symbols to supplement those provided in the Knuth&rsquo;s
+original TeX distribution, and are available in Type 1 format in
+modern distributions. Support files for using the fonts, both under
Plain TeX and LaTeX (packages <i>amssymb</i> and
<i>amsfonts</i>), are available. The font shape is a rather
austere sans, which many people don&rsquo;t like (though it captures the
@@ -34,6 +36,10 @@ comes from a package by Torsten Hilbrich.
and sans shapes, at a single weight, and is available both as Metafont
sources and as Type 1; the font covers the uppercase latin letters,
lowercase &lsquo;h&rsquo; and &rsquo;k&rsquo;, and the digit &lsquo;1&rsquo;.
+<p/>A document that shows the <i>bbm</i>, <i>bbold</i>,
+<i>doublestroke</i> and <i>msbm</i> fonts, so that you can get
+a feel for their appearance, is available (CTAN package
+<i>blackboard</i>).
<p/>An alternative source of Type 1 fonts with blackboard bold characters
may be found in the steadily increasing set of complete families, both
commercial and free, that have been prepared for use with (La)TeX
@@ -49,36 +55,38 @@ the digit &lsquo;1&rsquo;, and lower-case &lsquo;k&rsquo;.
<p/>The &ldquo;lazy person&rsquo;s&rdquo; blackboard bold macros:
<blockquote>
<pre>
-\newcommand{\R}{{\sf R\hspace*{-0.9ex}%
+\newcommand{\R}{{\textsf{R}\hspace*{-0.9ex}%
\rule{0.15ex}{1.5ex}\hspace*{0.9ex}}}
-\newcommand{\N}{{\sf N\hspace*{-1.0ex}%
+\newcommand{\N}{{\textsf{N}\hspace*{-1.0ex}%
\rule{0.15ex}{1.3ex}\hspace*{1.0ex}}}
-\newcommand{\Q}{{\sf Q\hspace*{-1.1ex}%
+\newcommand{\Q}{{\textsf{Q}\hspace*{-1.1ex}%
\rule{0.15ex}{1.5ex}\hspace*{1.1ex}}}
-\newcommand{\C}{{\sf C\hspace*{-0.9ex}%
+\newcommand{\C}{{\textsf{C}\hspace*{-0.9ex}%
\rule{0.15ex}{1.3ex}\hspace*{0.9ex}}}
</pre>
</blockquote><p>
are almost acceptable at normal size if the surrounding text is
-<i>cmr10</i>. However, they are not part of a proper maths font,
-and so do not work in sub- and superscripts. Moreover, the size and
-position of the vertical bar can be affected by the font of the
-surrounding text. As we&rsquo;ve seen, there are plenty of alternatives:
-don&rsquo;t try the macros, or anything similar using capital &lsquo;I&rsquo; (which
-looks even worse!).
+<i>cmr10</i> (the position of the vertical bar can be affected by
+the surrounding font). However, they are not part of a proper maths font,
+and do not work in sub- and superscripts. As we&rsquo;ve seen, there are
+plenty of alternatives: that mythical &ldquo;lazy&rdquo; person can inevitably
+do better than the macros, or anything similar using capital &lsquo;I&rsquo;
+(which looks even worse!). Voluntary (La)TeX effort has redefined
+the meaning of laziness (in this respect!).
<dl>
-<dt><tt><i>AMS support files (Plain)</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/amsfonts/plaintex.zip">fonts/amsfonts/plaintex</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/amsfonts/plaintex.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/amsfonts/plaintex/">browse</a>)
-<dt><tt><i>AMS support files (LaTeX)</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/amsfonts/latex.zip">fonts/amsfonts/latex</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/amsfonts/latex.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/amsfonts/latex/">browse</a>)
-<dt><tt><i>AMS symbol fonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/amsfonts/sources/symbols.zip">fonts/amsfonts/sources/symbols</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/amsfonts/sources/symbols.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/amsfonts/sources/symbols/">browse</a>)
-<dt><tt><i>AMS symbol fonts in Type 1 format</i></tt><dd>Browse <a href="http://www.tex.ac.uk/tex-archive/fonts/amsfonts/ps-type1/">fonts/amsfonts/ps-type1/</a>
-<dt><tt><i>bbm fonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/cm/bbm.zip">fonts/cm/bbm</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/cm/bbm.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/cm/bbm/">browse</a>)
-<dt><tt><i>bbm macros</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/macros/latex/contrib/bbm.zip">macros/latex/contrib/bbm</a> (<a href="ftp://cam.ctan.org/tex-archive/macros/latex/contrib/bbm.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/macros/latex/contrib/bbm/">browse</a>)
-<dt><tt><i>bbold fonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/bbold.zip">fonts/bbold</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/bbold.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/bbold/">browse</a>)
-<dt><tt><i>doublestroke fonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/doublestroke.zip">fonts/doublestroke</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/doublestroke.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/doublestroke/">browse</a>)
-<dt><tt><i>fourier fonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/fourier-GUT.zip">fonts/fourier-GUT</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/fourier-GUT.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/fourier-GUT/">browse</a>)
-<dt><tt><i>mathpazo fonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/mathpazo.zip">fonts/mathpazo</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/mathpazo.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/mathpazo/">browse</a>)
-<dt><tt><i>pxfonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/pxfonts.zip">fonts/pxfonts</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/pxfonts.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/pxfonts/">browse</a>)
-<dt><tt><i>txfonts</i></tt><dd><a href="ftp://cam.ctan.org/tex-archive/fonts/txfonts.zip">fonts/txfonts</a> (<a href="ftp://cam.ctan.org/tex-archive/fonts/txfonts.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/fonts/txfonts/">browse</a>)
+<dt><tt><i>AMS support files (Plain)</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/amsfonts/plaintex.zip">fonts/amsfonts/plaintex</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/amsfonts/plaintex/">browse the directory</a>)
+<dt><tt><i>AMS support files (LaTeX)</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/amsfonts/latex.zip">fonts/amsfonts/latex</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/amsfonts/latex/">browse the directory</a>)
+<dt><tt><i>AMS symbol fonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/amsfonts/sources/symbols.zip">fonts/amsfonts/sources/symbols</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/amsfonts/sources/symbols/">browse the directory</a>)
+<dt><tt><i>AMS symbol fonts in Type 1 format</i></tt><dd>Browse <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archivefonts/amsfonts/ps-type1/">fonts/amsfonts/ps-type1/</a>
+<dt><tt><i>bbm fonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/cm/bbm.zip">fonts/cm/bbm</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/cm/bbm/">browse the directory</a>)
+<dt><tt><i>bbm macros</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/macros/latex/contrib/bbm.zip">macros/latex/contrib/bbm</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/macros/latex/contrib/bbm/">browse the directory</a>)
+<dt><tt><i>bbold fonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/bbold.zip">fonts/bbold</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/bbold/">browse the directory</a>)
+<dt><tt><i>blackboard evaluation set</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/info/symbols/blackboard.zip">info/symbols/blackboard</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/info/symbols/blackboard/">browse the directory</a>)
+<dt><tt><i>doublestroke fonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/doublestroke.zip">fonts/doublestroke</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/doublestroke/">browse the directory</a>)
+<dt><tt><i>fourier fonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/fourier-GUT.zip">fonts/fourier-GUT</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/fourier-GUT/">browse the directory</a>)
+<dt><tt><i>mathpazo fonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/mathpazo.zip">fonts/mathpazo</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/mathpazo/">browse the directory</a>)
+<dt><tt><i>pxfonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/pxfonts.zip">fonts/pxfonts</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/pxfonts/">browse the directory</a>)
+<dt><tt><i>txfonts</i></tt><dd><a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/txfonts.zip">fonts/txfonts</a> (or <a href="http://www.tex.ac.uk/www.tex.ac.uk tex-archive/fonts/txfonts/">browse the directory</a>)
</dl>
<p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=numbersets">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=numbersets</a>
</body>