| 25235 |      1 |   <ul>
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|  |      2 |     <li>Higher-Order Logic</li>
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|  |      3 | 
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|  |      4 |     <li style="list-style: none">
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|  |      5 |       <ul>
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| 28307 |      6 |         <li><a href="HOL/index.html">HOL (Higher-Order Logic)</a>
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|  |      7 |         is a version of classical higher-order logic resembling
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|  |      8 |         that of the <a href="http://www.cl.cam.ac.uk/Research/HVG/HOL/">HOL System</a>.
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|  |      9 |         </li>
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| 25235 |     10 | 
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| 28307 |     11 |         <li><a href="HOLCF/index.html">HOLCF (Higher-Order Logic of Computable Functions)</a>
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|  |     12 |         adds Scott's Logic for Computable Functions (domain theory) to HOL.
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|  |     13 |         </li>
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| 25235 |     14 |       </ul>
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|  |     15 |     </li>
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|  |     16 |   </ul>
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|  |     17 | 
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|  |     18 |   <ul>
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|  |     19 |     <li>First-Order Logic</li>
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|  |     20 | 
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|  |     21 |     <li style="list-style: none">
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|  |     22 |       <ul>
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| 28307 |     23 |         <li><a href="FOL/index.html">FOL (Many-sorted First-Order Logic)</a>
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|  |     24 |         provides basic classical and intuitionistic first-order logic. It is
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|  |     25 |         polymorphic.
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|  |     26 |         </li>
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| 25235 |     27 | 
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| 28307 |     28 |         <li><a href="ZF/index.html">ZF (Set Theory)</a>
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|  |     29 |         offers a formulation of Zermelo-Fraenkel set theory on top of FOL.
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|  |     30 |         </li>
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| 25235 |     31 | 
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|  |     32 |         <li><a href="CCL/index.html">CCL (Classical Computational Logic)</a></li>
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|  |     33 | 
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|  |     34 |         <li><a href="LCF/index.html">LCF (Logic of Computable Functions)</a></li>
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|  |     35 | 
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|  |     36 |         <li><a href="FOLP/index.html">FOLP (FOL with Proof Terms)</a></li>
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|  |     37 |       </ul>
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|  |     38 |     </li>
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|  |     39 |   </ul>
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|  |     40 | 
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|  |     41 |   <ul>
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|  |     42 |     <li>Miscellaneous</li>
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|  |     43 | 
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|  |     44 |     <li style="list-style: none">
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|  |     45 |       <ul>
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|  |     46 |         <li><a href="Sequents/index.html">Sequents (first-order, modal and linear logics)</a></li>
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|  |     47 | 
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| 28307 |     48 |         <li><a href="CTT/index.html">CTT (Constructive Type Theory)</a>
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|  |     49 |         is an extensional version of Martin-Löf's Type Theory.</li>
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| 25235 |     50 | 
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|  |     51 |         <li><a href="Cube/index.html">Cube (The Lambda Cube)</a></li>
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|  |     52 |       </ul>
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|  |     53 |     </li>
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|  |     54 |   </ul>
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|  |     55 | 
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