- <li><span style="font-weight: bold;">December 2005.</span> <a
- href="documentation.html#ldt1">First communication on λδ</a>.<br>
- </li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">May 2004.</span> The <a
- href="implementation.html#ldp1">specification of λδ version 1</a> is
-started with Coq 7.3.1.<br>
- </li>
- </ul>
- <h3 style="text-align: right;">Visibility <img
- style="width: 37px; height: 37px;" alt="[Butterfly]" title="Butterfly"
- src="images/b4.png"></h3>
- <ul>
- <li><span style="font-weight: bold;">June 2014.</span> The <a
- href="http://www.google.com/">Google</a> search for <span
- style="color: rgb(255, 0, 0);">formal system lambda delta</span> gives
-5 resources about λδ in the first 6 results.<br>
- </li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">June 2014.</span> The <a
- href="http://www.yahoo.com/">Yahoo</a> search <span
- style="color: rgb(255, 0, 0);">formal system lambda delta</span> gives
-4 resources about λδ in the first 5 results.</li>
- </ul>
- </td>
- </tr>
- </tbody>
-</table>
-<br>
-<a href="http://validator.w3.org/check?uri=referer"><img
- alt="[Valid HTML 4.01 Transitional]"
- title="Valid HTML 4.01
- Transitional"
- src="http://www.w3.org/Icons/valid-html401"
- style="border: 0px solid ; width: 88px; height: 31px;"></a> <a
- href="http://www.anybrowser.org/campaign/"><img
- alt="[Use Any
- Browser Here]" title="Use Any Browser Here"
- src="images/globe_trans.png"
- style="border: 0px solid ; width: 147px; height: 42px;"></a> <img
- style="width: 88px; height: 31px;" alt="[PNG Used Here]"
- title="PNG Used Here" src="images/PNGnow2.png"><br>
-<br>
-Last update 2014-06-19 by <a href="http://www.cs.unibo.it/%7Efguidi/">Ferruccio
-Guidi</a><br>
-</div>
+ <li>
+ The character "-" is reserved in λδ textual syntax
+ (recognized by "Helena 0.8.1").
+ </li>
+ <li>
+ Eventually, the occurrences of the character "-"
+ will be replaced by "_" in all λδ-related identifiers.
+ </li>
+ <li>
+ In particular, this refactoring involves file names and path names.
+ </li>
+ </ul>
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">April 2011.</span>
+ The specification of <a href="http://lambdadelta.info/version_2.html">λδ version 2</a>
+ and related topics is restarted in
+ <a href="http://matita.cs.unibo.it/">Matita 0.5</a>.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">December 2010.</span>
+ Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">November 2010.</span>
+ "Helena 0.8.1" is released.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">September 2009.</span>
+ "Helena 0.8.0" is released and the
+ <a href="http://lambdadelta.info/implementation.html#lddl">λδ Digital Library</a>
+ is started.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">June 2009.</span>
+ "Helena", a <a href="http://lambdadelta.info/implementation.html#helena">validator for λδ version 2</a>,
+ is available as a part of the <a href="http://helm.cs.unibo.it/">HELM</a> software.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">September 2008.</span>
+ This site is online.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">July 2008.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldJ1">First journal paper on λδ</a>
+ accepted for publication.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">July 2008.</span>
+ First <a href="http://helm.cs.unibo.it/procedural/">procedural reconstruction</a>
+ for <a href="http://matita.cs.unibo.it/">Matita 0.5</a>
+ of the λδ version 1 for Coq 7.3.1.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">June 2008.</span>
+ The <a href="http://lambdadelta.info/version_1.html#static">
+ HTML pages of the specification of λδ version 1 for Matita 0.5</a>
+ are online.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">May 2008.</span>
+ The specification of λδ version 1 is dismissed.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">March 2008.</span>
+ The specification of λδ version 2 is started with Coq 7.3.1 (false start).
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">September 2007.</span>
+ The <a href="http://lambdadelta.info/version_1.html#dynamic">
+ specification of λδ version 1 for Matita 0.4</a>
+ is online.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">November 2006.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldR2">λδ version 1</a>
+ is released.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">December 2005.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldP1">First communication on λδ version 1</a>.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">May 2004.</span>
+ The specification of <a href="http://lambdadelta.info/version_1.html">λδ version 1</a>
+ is started with Coq 7.3.1.
+ </li>
+ </ul>
+
+ <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="visibility">Visibility <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b3.png" />
+ </div>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">June 2014.</span>
+ The <a href="http://www.google.com/">Google</a>
+ search for "formal system lambda delta" gives
+ 5 resources about λδ in the first 6 results.
+ </li>
+ </ul>
+
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="date">June 2014.</span>
+ The <a href="http://www.yahoo.com/">Yahoo</a>
+ search for "formal system lambda delta" gives
+ 4 resources about λδ in the first 5 results.
+ </li>
+ </ul>
+
+ <div class="spacer">
+ <img class="rule" alt="[Spacer]" title="lambdadelta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
+ </div>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">
+ <br />
+ </div>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">
+ <a href="http://validator.w3.org/check?uri=referer">
+ <img class="w3c" alt="[Valid XHTML 1.1]" title="Valid XHTML 1.1" src="http://www.w3.org/Icons/valid-xhtml11-blue" />
+ </a>
+ <a href="http://jigsaw.w3.org/css-validator/check/referer">
+ <img class="w3c" alt="[Valid CSS level 2]" title="Valid CSS level 2" src="http://www.w3.org/Icons/valid-css2-blue" />
+ </a>
+ <a href="http://www.w3.org/XML/">
+ <img class="w3c" alt="[Generated from XML via XSL]" title="Generated from XML via XSL" src="http://lambdadelta.info/images/xml_xsl2.png" />
+ </a>
+ <a href="http://www.w3.org/Graphics/PNG/">
+ <img class="w3c" alt="[PNG used here]" title="PNG used here" src="http://lambdadelta.info/images/PNGnow2.png" />
+ </a>
+ <a href="http://www.anybrowser.org/campaign/">
+ <img class="w3c" alt="[Viewable with any browser]" title="Viewable with any browser" src="http://www.anybrowser.org/campaign/bvgraphics/abtfile.png" />
+ </a>
+ </div>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">
+ <br />
+ </div>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Sun, 05 Oct 2014 16:38:31 +0200</div>