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  22     <div class="head1">The Formal System λδ (\lambda\delta)</div>
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  33             <td class="snns capitalize italic sky">
  34               <a href="http://lambdadelta.info/index.html">home</a>
  35             </td>
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  37               <a href="http://lambdadelta.info/news.html">news</a>
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  39             <td class="snns capitalize italic white">
  40               <a href="http://lambdadelta.info/specification.html">specification</a>
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  48             <td class="snns capitalize italic orange">
  49               <a href="http://lambdadelta.info/documentation.html">documentation</a>
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  51             <td class="snns capitalize italic green">
  52               <a href="http://lambdadelta.info/implementation.html">implementation</a>
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  60               <a href="http://lambdadelta.info/index.html#foreword">foreword</a>
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  63               <a href="http://lambdadelta.info/news.html#milestones">milestones</a>
  64             </td>
  65             <td class="snns capitalize white">
  66               <a href="http://lambdadelta.info/specification.html#v2">version 2</a>
  67             </td>
  68             <td class="snnn capitalize white">(<a href="http://lambdadelta.info/ground_2.html">background</a> - <a href="http://lambdadelta.info/basic_2.html">core</a> - <a href="http://lambdadelta.info/apps_2.html">applications</a>)</td>
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  73               <a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
  74             </td>
  75             <td class="snns capitalize green">
  76               <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
  77             </td>
  78             <td class="ssnn capitalize green">(<a href="http://lambdadelta.info/static/lddl/">static LDDL directory</a>)</td>
  79           </tr>
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  82               <a href="http://lambdadelta.info/index.html#citations">citations</a>
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  85               <a href="http://lambdadelta.info/news.html#visibility">visibility</a>
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  88               <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
  89             </td>
  90             <td class="snsn capitalize white">(<a href="http://lambdadelta.info/ground_1.html">background</a> - <a href="http://lambdadelta.info/basic_1.html">core</a>)</td>
  91             <td class="snsn capitalize white">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
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  93               <a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
  94             </td>
  95             <td class="snss capitalize green">
  96               <a href="http://lambdadelta.info/implementation.html#helena">helena</a>
  97             </td>
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 106     </div>
 107     <div xmlns:ld="http://lambdadelta.info/" class="text">
 108       The formal system λδ (\lambda\delta) is a typed λ-calculus aiming to support
 109       the foundations of Mathematics that require an underlying specification language
 110       (for example the <a href="http://www.math.unipd.it/~maietti/">Minimal Type Theory</a>
 111        and its predecessors).
 112    </div>
 113     <div xmlns:ld="http://lambdadelta.info/" class="text">
 114       λδ is developed in the context of the
 115       <a href="http://helm.cs.unibo.it/">Hypertextual Electronic Library of Mathematics</a>
 116       as a machine-checked digital specification
 117       that is not the formal counterpart of previous informal material.
 118    </div>
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 120       This is the System logo: <a href="http://lambdadelta.info/images/crux_177.png">crux_177.png</a>
 121       (revised <span class="emph alpha">2012-09</span>).
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 131     <!-- ===================================================================== -->
 132     <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="citations">Citations <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b9.png" />
 133     </div>
 134     <div xmlns:ld="http://lambdadelta.info/" class="text">
 135       This is a list of publications citing λδ (not including our own).
 136    </div>
 137     <ul xmlns:ld="http://lambdadelta.info/" id="C6">
 138       <li>
 139       A. Asperti, W. Ricciotti, C. Sacerdoti Coen, E. Tassi:
 140       <span class="emph alpha">Formal metatheory of programming languages in the Matita interactive theorem prover</span>
 141       (2012). In JAR 49(3), pp. 427-451.
 142    </li>
 143     </ul>
 144     <ul xmlns:ld="http://lambdadelta.info/" id="C5">
 145       <li>
 146       M.E. Maietti:
 147       <span class="emph alpha">Consistency of the minimalist foundation with Church thesis and Bar Induction</span>
 148       (2012). Submitted article.
 149    </li>
 150     </ul>
 151     <ul xmlns:ld="http://lambdadelta.info/" id="C4">
 152       <li>
 153       W. Ricciotti:
 154       <span class="emph alpha">Theoretical and implementation aspects in the mechanization of the metatheory of programming languages</span>
 155       (July 2011). Ph.D. Thesis in Computer Science, Technical Report UBLCS-2011-09, University of Bologna.
 156    </li>
 157     </ul>
 158     <ul xmlns:ld="http://lambdadelta.info/" id="C3">
 159       <li>
 160       C.E. Brown:
 161       <span class="emph alpha">Faithful Reproductions of the Automath Landau Formalization</span>
 162       (2011). Typescript note.
 163    </li>
 164     </ul>
 165     <ul xmlns:ld="http://lambdadelta.info/" id="C2">
 166       <li>
 167       M.E. Maietti:
 168       <span class="emph alpha">A minimalist two-level foundation for constructive mathematics</span>
 169       (2009). In APAL 160(3), pp. 319-354.
 170    </li>
 171     </ul>
 172     <ul xmlns:ld="http://lambdadelta.info/" id="C1">
 173       <li>
 174       V. Rahili:
 175       <span class="emph alpha">First Year Report: Realisability methods of proof and semantics with application to expansion</span>
 176       (July 2007). Typescript note.
 177    </li>
 178     </ul>
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