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+<html>
+<head>
+<title>Binary and relational opertors</title>
+</head>
+<body bgcolor="#ffffff" text="#000000" link="#000099" vlink="#cc0000" alink="#cc0000">
+<h1><font size="-2">Hypertext Help with LaTeX</font><br><font color="#cc0000">Binary and relational operators</font></h1>
+Some "math" symbols are obtained by typing the corresponding keyboard
+character. Examples include
+<pre> + - = &lt; &gt; </pre>
+<strong>Note:</strong> plus, minus, and equal sign may be used in
+either text or math mode, but &lt; and &gt; are math mode only
+(they produce inverted exclamation and question marks, respectively,
+in text mode).
+<p>
+The following commands may be used only in math mode.
+
+<ul>
+<li><tt>\pm</tt> plus or minus sign
+<li><tt>\mp</tt> minus or plus sign
+<li><tt>\times</tt> times (an "x")
+<li><tt>\div</tt> divided by sign
+<li><tt>\ast</tt> an asterisk (centered)
+<li><tt>\star</tt> a five-point star (centered)
+<li><tt>\bullet</tt> a bullet
+<li><tt>\circ</tt> an open bullet
+<li><tt>\cdot</tt> a centered dot (see also,
+ <a href="ltx-207.html"><tt>\cdots</tt></a>)
+<p>
+<li><tt>\leq</tt> less than or equal to
+<li><tt>\ll</tt> much less than
+<li><tt>\subset</tt> is a subset of
+<li><tt>\geq</tt> greater than or equal to
+<li><tt>\gg</tt> much greater than
+<li><tt>\equiv</tt> equivalence symbol
+<li><tt>\sim</tt> similar to
+<li><tt>\simeq</tt> similar or equal to
+<li><tt>\approx</tt> approximately equal to
+<li><tt>\neq</tt> not equal to
+<li><tt>\per</tt> "perpendicular to" symbols
+<li><tt>\propto</tt> proportional to
+</ul>
+<p>
+Note that "greater than" and "less than" are obtained simply by
+entering <tt>&gt;</tt> and <tt>&lt;</tt>.
+<p>
+A slash, indicating <a name=not>"not"</a> can be placed through a symbol
+(or a letter) with the <tt>\not</tt> command. For example, not less than is
+<pre> \not&lt;
+</pre>
+and not less than or equal to is
+<pre> \not\leq
+</pre>
+If the slash isn't properly positioned it can be moved by putting a
+<a href="ltx-118.html">math mode spacing command</a> between the <tt>\not</tt>
+and the symbol.
+<p>
+Related topics:
+<ul>
+<li><a href="ltx-406.html">Arrows</a>
+<li><a href="ltx-403.html">Delimiters</a>
+<li><a href="ltx-405.html">Greek letters</a>
+<li><a href="ltx-407.html">Miscellaneous symbols</a>
+<li><a href="ltx-408.html">Variable size symbols</a> (sums, integrals, etc.)
+</ul>
+<hr>
+See also <a href="ltx-115.html">Math Formulas</a>,
+ <a href="ltx-117.html">Math Symbols</a><br>
+Back to the <a href="ltx-2.html">LaTeX Table of Contents</a>
+<hr>
+<address>
+Revised: Sheldon Green, 7Jul 1995.
+</address>
+</body>
+</html>
+