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<a accesskey="3" href="page.php?w=Boolean_algebra&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=mathematics">mathematics</a> and <a href="page.php?w=mathematical_logic">mathematical logic</a>, <b>Boolean algebra</b> is a branch of <a href="page.php?w=algebra">algebra</a>. It differs from <a href="page.php?w=elementary_algebra">elementary algebra</a> in two ways. First, the values of the <a href="page.php?w=variable_%28mathematics%29">variables</a> are the <a href="page.php?w=truth_value">truth value</a>s true and false, usually denoted by 1 and 0, whereas in elementary algebra the values of the variables are numbers.</p><p>
<a accesskey="3" href="page.php?w=Boolean_algebra&amp;p=2">3.Next</a>
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