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  22     <div class="head1">The Formal System λδ (\lambda\delta)</div>
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  33             <td class="snns component sky">
  34               <a href="http://lambdadelta.info/index.html">home</a>
  35             </td>
  36             <td class="snns component magenta">
  37               <a href="http://lambdadelta.info/news.html">news</a>
  38             </td>
  39             <td class="snns component orange">
  40               <a href="http://lambdadelta.info/documentation.html">documentation</a>
  41             </td>
  42             <td class="snns component green">
  43               <a href="http://lambdadelta.info/implementation.html">implementation</a>
  44             </td>
  45             <td class="ssnn component green">(<a href="http://lambdadelta.info/implementation.html#specifications">specifications</a>
  46               <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
  47               <a href="http://lambdadelta.info/implementation.html#helena">Helena</a>)</td>
  48           </tr>
  49           <tr>
  50             <td class="snns sky">
  51               <a href="http://lambdadelta.info/index.html#foreword">Foreword</a>
  52             </td>
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  54               <a href="http://lambdadelta.info/news.html#milestones">Milestones</a>
  55             </td>
  56             <td class="snns orange">
  57               <a href="http://lambdadelta.info/documentation.html#v2">Version 2</a>
  58             </td>
  59             <td class="snns green">
  60               <a href="http://lambdadelta.info/version_2.html">Version 2</a>
  61             </td>
  62             <td class="ssnn green">
  63               <a href="http://lambdadelta.info/ground_2.html">Background</a>
  64               <a href="http://lambdadelta.info/basic_2.html">Core</a>
  65               <a href="http://lambdadelta.info/apps_2.html">Applications</a>
  66             </td>
  67           </tr>
  68           <tr>
  69             <td class="snss sky">
  70               <a href="http://lambdadelta.info/index.html#notice">Notice</a>
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  73               <a href="http://lambdadelta.info/news.html#visibility">Visibility</a>
  74             </td>
  75             <td class="snss orange">
  76               <a href="http://lambdadelta.info/documentation.html#v1">Version 1</a>
  77             </td>
  78             <td class="snss green">
  79               <a href="http://lambdadelta.info/version_1.html">Version 1</a>
  80             </td>
  81             <td class="sssn green">
  82               <br />
  83             </td>
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  87     </div>
  88
  89    <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="milestones">Milestones <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b5.png" />
  90     </div>
  91    <div xmlns:ld="http://lambdadelta.info/" class="text">
  92       <ul>
  93         <li>
  94           <span class="date">June 2014.</span>
  95          <a href="http://lambdadelta.info/documentation.html#ldt8">First communication on λδ version 2.</a>
  96       </li>
  97       </ul>
  98       <ul>
  99         <li>
 100           <span class="date">December 2012.</span>
 101          The character "_" is removed from the denomination "lambda_delta":
 102          <ul>
 103             <li>
 104                The denomination "\lambda\delta" is used in λδ-related texts.
 105             </li>
 106             <li>
 107                The denomination "lambdadelta" is used in λδ-related identifiers.
 108             </li>
 109             <li>
 110               Permanent λδ URL acquired:
 111               <a href="http://lambdadelta.info/">http://lambdadelta.info/</a>
 112               (pointing at this site).
 113             </li>
 114          </ul>
 115       </li>
 116       </ul>
 117       <ul>
 118         <li>
 119           <span class="date">September 2011.</span>
 120          The denomination "lambda-delta" changes to "lambda_delta":
 121          <ul>
 122             <li>
 123                The character "-" is reserved in λδ textual syntax
 124                (recognized by "Helena 0.8.1").
 125             </li>
 126             <li>
 127                Eventually, the occurrences of the character "-"
 128                will be replaced by "_" in all λδ-related identifiers.
 129             </li>
 130             <li>
 131                In particular, this refactoring involves file names and path names.
 132             </li>
 133          </ul>
 134       </li>
 135       </ul>
 136       <ul>
 137         <li>
 138           <span class="date">April 2011.</span>
 139          The specification of <a href="http://lambdadelta.info/version_2.html">λδ version 2</a>
 140          and related topics is restarted in
 141          <a href="http://matita.cs.unibo.it/">Matita 0.5</a>.
 142       </li>
 143       </ul>
 144       <ul>
 145         <li>
 146           <span class="date">December 2010.</span>
 147          Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
 148       </li>
 149       </ul>
 150       <ul>
 151         <li>
 152           <span class="date">November 2010.</span>
 153          "Helena 0.8.1" is released.
 154       </li>
 155       </ul>
 156       <ul>
 157         <li>
 158           <span class="date">September 2009.</span>
 159          "Helena 0.8.0" is released and the
 160          <a href="http://lambdadelta.info/implementation.html#lddl">λδ Digital Library</a>
 161          is started.
 162       </li>
 163       </ul>
 164       <ul>
 165         <li>
 166           <span class="date">June 2009.</span>
 167          "Helena", a <a href="http://lambdadelta.info/implementation.html#helena">validator for λδ version 2</a>,
 168          is available as a part of the <a href="http://helm.cs.unibo.it/">HELM</a> software.
 169       </li>
 170       </ul>
 171       <ul>
 172         <li>
 173           <span class="date">September 2008.</span>
 174          This site is online.
 175       </li>
 176       </ul>
 177       <ul>
 178         <li>
 179           <span class="date">July 2008.</span>
 180          <a href="http://lambdadelta.info/documentation.html#ldp5">First journal paper on λδ</a>
 181          accepted for publication.
 182       </li>
 183       </ul>
 184       <ul>
 185         <li>
 186           <span class="date">July 2008.</span>
 187          First <a href="http://helm.cs.unibo.it/procedural/">procedural reconstruction</a>
 188          for <a href="http://matita.cs.unibo.it/">Matita 0.5</a>
 189          of the λδ version 1 for Coq 7.3.1.
 190       </li>
 191       </ul>
 192       <ul>
 193         <li>
 194           <span class="date">June 2008.</span>
 195          The <a href="http://lambdadelta.info/version_1.html#static">
 196             HTML pages of the specification of λδ version 1 for Matita 0.5</a>
 197          are online.
 198       </li>
 199       </ul>
 200       <ul>
 201         <li>
 202           <span class="date">May 2008.</span>
 203          The specification of λδ version 1 is dismissed.
 204       </li>
 205       </ul>
 206       <ul>
 207         <li>
 208           <span class="date">March 2008.</span>
 209          The specification of λδ version 2 is started with Coq 7.3.1 (false start).
 210       </li>
 211       </ul>
 212       <ul>
 213         <li>
 214           <span class="date">September 2007.</span>
 215          The <a href="http://lambdadelta.info/version_1.html#dynamic">
 216             specification of λδ version 1 for Matita 0.4</a>
 217          is online.
 218       </li>
 219       </ul>
 220       <ul>
 221         <li>
 222           <span class="date">November 2006.</span>
 223          <a href="http://lambdadelta.info/documentation.html#ldp3">λδ version 1</a>
 224          is released.
 225       </li>
 226       </ul>
 227       <ul>
 228         <li>
 229           <span class="date">December 2005.</span>
 230          <a href="http://lambdadelta.info/documentation.html#ldt1">First communication on λδ</a>.
 231       </li>
 232       </ul>
 233       <ul>
 234         <li>
 235           <span class="date">May 2004.</span>
 236          The specification of <a href="http://lambdadelta.info/version_1.html">λδ version 1</a>
 237          is started with Coq 7.3.1.
 238       </li>
 239       </ul>
 240    </div>
 241
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 244    <div xmlns:ld="http://lambdadelta.info/" class="text">
 245       <ul>
 246         <li>
 247           <span class="date">June 2014.</span>
 248          The <a href="http://www.google.com/">Google</a>
 249          search for "formal system lambda delta" gives
 250          5 resources about λδ in the first 6 results.
 251       </li>
 252       </ul>
 253       <ul>
 254         <li>
 255           <span class="date">June 2014.</span>
 256          The <a href="http://www.yahoo.com/">Yahoo</a>
 257          search for "formal system lambda delta" gives
 258          4 resources about λδ in the first 5 results.
 259       </li>
 260       </ul>
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 289     <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Sun, 20 Jul 2014 15:02:32 +0200</div>
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