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<a accesskey="3" href="page.php?w=mathematical_logic&amp;p=2">3.Next</a>
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<p><b>Mathematical logic</b> is the study of <a href="page.php?w=Logic">formal logic</a> within <a href="page.php?w=mathematics">mathematics</a>. Major subareas include <a href="page.php?w=model_theory">model theory</a>, <a href="page.php?w=proof_theory">proof theory</a>, <a href="page.php?w=set_theory">set theory</a>, and <a href="page.php?w=recursion_theory">recursion theory</a> (also known as computability theory). Research in mathematical logic commonly addresses the mathematical properties of formal systems of logic such as their expressive</p><p>
<a accesskey="3" href="page.php?w=mathematical_logic&amp;p=2">3.Next</a>
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