<body lang="en-US">
<div class="spacer">
<a href="http://lambdadelta.info/">
- <img class="icon32" alt="[lambdadelta home]" title="lambdadelta home" src="http://lambdadelta.info/images/crux_32.png" />
+ <img class="icon32" alt="[\lambda\delta home]" title="\lambda\delta home" src="http://lambdadelta.info/images/crux_32.png" />
</a>
</div>
- <div class="head1">The Formal System λδ (\lambda\delta)</div>
+ <div class="head1">The Formal Systems of the λδ (\lambda\delta) Family</div>
<div class="spacer">
- <img class="rule" alt="[Spacer]" title="lambdadelta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
+ <img class="rule" alt="[Spacer]" title="\lambda\delta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
</div>
- <div xmlns:ld="http://lambdadelta.info/" class="spacer">
+
<div xmlns:ld="http://lambdadelta.info/" class="spacer">
<br />
</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
<tbody>
<tr>
<td class="snns capitalize italic sky">
- <a href="http://lambdadelta.info/index.html">home</a>
+ <a href="http://lambdadelta.info/home.html">home</a>
</td>
<td class="snns capitalize italic magenta">
<a href="http://lambdadelta.info/news.html">news</a>
</td>
+ <td class="snns capitalize italic white">
+ <a href="http://lambdadelta.info/specification.html">specification</a>
+ </td>
+ <td class="snnn capitalize italic white">
+ <br />
+ </td>
+ <td class="snnn capitalize italic white">
+ <br />
+ </td>
<td class="snns capitalize italic orange">
<a href="http://lambdadelta.info/documentation.html">documentation</a>
</td>
<td class="snns capitalize italic green">
- <a href="http://lambdadelta.info/specification.html">specification</a>
+ <a href="http://lambdadelta.info/implementation.html">implementation</a>
</td>
- <td class="snnn capitalize italic green">
+ <td class="ssnn capitalize italic green">
<br />
</td>
- <td class="ssns capitalize italic green">
- <a href="http://lambdadelta.info/implementation.html">implementation</a>
- </td>
</tr>
<tr>
<td class="snns capitalize sky">
- <a href="http://lambdadelta.info/index.html#foreword">foreword</a>
+ <a href="http://lambdadelta.info/home.html#foreword">foreword</a>
</td>
<td class="snns capitalize magenta">
<a href="http://lambdadelta.info/news.html#milestones">milestones</a>
</td>
+ <td class="snns capitalize white">
+ <a href="http://lambdadelta.info/specification.html#v2">version 2</a>
+ </td>
+ <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>
+ <td class="snnn capitalize white">
+ <br />
+ </td>
<td class="snns capitalize orange">
<a href="http://lambdadelta.info/documentation.html#v2">version 2</a>
</td>
<td class="snns capitalize green">
- <a href="http://lambdadelta.info/specification.html#v2">version 2</a>
+ <a href="http://lambdadelta.info/implementation.html#helena">helena</a>
</td>
- <td class="snnn capitalize green">(<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>
- <td class="ssns capitalize green">
- <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
+ <td class="ssnn capitalize green">
+ <a href="http://lambdadelta.info/osn/">Open Symbolic Notation (OSN)</a>
</td>
</tr>
<tr>
<td class="snss capitalize sky">
- <a href="http://lambdadelta.info/index.html#notice">notice</a>
+ <a href="http://lambdadelta.info/home.html#citations">citations</a>
</td>
<td class="snss capitalize magenta">
<a href="http://lambdadelta.info/news.html#visibility">visibility</a>
</td>
+ <td class="snss capitalize white">
+ <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
+ </td>
+ <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>
+ <td class="snsn capitalize white">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
<td class="snss capitalize orange">
<a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
</td>
<td class="snss capitalize green">
- <a href="http://lambdadelta.info/specification.html#v1">version 1</a>
- </td>
- <td class="snsn capitalize green">
- <br />
- </td>
- <td class="ssss capitalize green">
- <a href="http://lambdadelta.info/implementation.html#helena">helena</a>
+ <a href="http://lambdadelta.info/implementation.html#lddl">library</a>
</td>
+ <td class="sssn capitalize green">(<a href="http://lambdadelta.info/static/lddl/">static LDDL directory</a>)</td>
</tr>
</tbody>
</table>
</div>
-
- <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="milestones">Milestones <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b3.png" />
+ <!-- ===================================================================== -->
+ <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="milestones">Milestones <img class="icon37" alt="[butterfly]" title="\lambda\delta butterfly" src="http://lambdadelta.info/images/b3.png" />
</div>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">July 2014.</span>
- A new version of this site is online.
+ <span class="emph alpha">December 2015.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldJ3a">Second journal paper on λδ</a>
+ accepted for publication.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">June 2014.</span>
- <a href="http://lambdadelta.info/documentation.html#ldP8">First communication on λδ version 2.</a>
+ <span class="emph gamma">December 2015.</span>
+ <a href="http://lambdadelta.info/implementation.html#v3">"Helena 0.8.3"</a> is released.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">December 2012.</span>
+ <span class="emph delta">August 2015.</span>
+ The specification of λδ version 2A1 is concluded.
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph gamma">June 2015.</span>
+ The corrected specification of Landau's "Grundlagen der Analysis"
+ is validated in a λProlog implementation of λδ version 3.
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph delta">March 2015.</span>
+ The specification of λδ version 1 is validated by
+ <a href="http://matita.cs.unibo.it/">Matita 0.99.2</a>.
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph gamma">February 2015.</span>
+ <a href="http://lambdadelta.info/implementation.html#v2">"Helena 0.8.2"</a> is updated.
+ <ul>
+ <li class="">
+ The translated specification of Landau's "Grundlagen der Analysis"
+ is validated in CC by <a href="http://coq.inria.fr/">Coq 8.4.3</a>.
+ </li>
+ </ul>
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph delta">January 2015.</span>
+ The specification of <a href="http://lambdadelta.info/specification.html#v1">λδ version 1</a>
+ is updated with backports from the abandoned specification of λδ version 2.
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph gamma">December 2014.</span>
+ <a href="http://lambdadelta.info/implementation.html#v2">"Helena 0.8.2"</a> is released.
+ <ul>
+ <li class="">
+ The corrected specification of Landau's "Grundlagen der Analysis"
+ is validated in λδ version 3.
+ </li>
+ </ul>
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph gamma">October 2014.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldJ2a">λδ version 2A1</a>
+ is released.
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph beta">July 2014.</span>
+ A new version of this site is online.
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph beta">June 2014.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldP2c">First communication on λδ version 2.</a>
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph alpha">December 2012.</span>
The character "_" is removed from the denomination "lambda_delta":
<ul>
- <li>
+ <li class="">
The denomination "\lambda\delta" is used in λδ-related texts.
</li>
- <li>
+ <li class="">
The denomination "lambdadelta" is used in λδ-related identifiers.
</li>
- <li>
+ <li class="">
Permanent λδ URL acquired:
<a href="http://lambdadelta.info/">http://lambdadelta.info/</a>
(pointing at this site).
</li>
</ul>
- </li>
+ </li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">September 2011.</span>
+ <span class="emph alpha">September 2011.</span>
The denomination "lambda-delta" changes to "lambda_delta":
<ul>
- <li>
+ <li class="">
The character "-" is reserved in λδ textual syntax
(recognized by "Helena 0.8.1").
</li>
- <li>
+ <li class="">
Eventually, the occurrences of the character "-"
will be replaced by "_" in all λδ-related identifiers.
</li>
- <li>
+ <li class="">
In particular, this refactoring involves file names and path names.
</li>
</ul>
- </li>
+ </li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <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>
+ <span class="emph alpha">April 2011.</span>
+ The specification of <a href="http://lambdadelta.info/specification.html#v2">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/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">December 2010.</span>
+ <span class="emph delta">February 2011.</span>
+ The specification of λδ version 2 with Coq 7.3.1 is abandoned.
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/">
+ <li>
+ <span class="emph alpha">December 2010.</span>
Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">November 2010.</span>
- "Helena 0.8.1" is released.
+ <span class="emph beta">November 2010.</span>
+ <a href="http://lambdadelta.info/implementation.html#v1">"Helena 0.8.1"</a> is released.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <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.
+ <span class="emph beta">September 2009.</span>
+ <a href="http://lambdadelta.info/implementation.html#v0">"Helena 0.8.0"</a> 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/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">June 2009.</span>
+ <span class="emph alpha">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/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">September 2008.</span>
+ <span class="emph alpha">September 2008.</span>
This site is online.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <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>
+ <span class="emph delta">July 2008.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldJ1a">First journal paper on λδ</a>
accepted for publication.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">July 2008.</span>
+ <span class="emph delta">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/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">June 2008.</span>
- The <a href="http://lambdadelta.info/version_1.html#static">
+ <span class="emph delta">June 2008.</span>
+ The <a href="http://lambdadelta.info/specification.html#static1">
HTML pages of the specification of λδ version 1 for Matita 0.5</a>
are online.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">May 2008.</span>
- The specification of λδ version 1 is dismissed.
+ <span class="emph delta">May 2008.</span>
+ The specification of λδ version 1 is concluded.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">March 2008.</span>
+ <span class="emph alpha">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/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">September 2007.</span>
- The <a href="http://lambdadelta.info/version_1.html#dynamic">
+ <span class="emph gamma">September 2007.</span>
+ The <a href="http://lambdadelta.info/specification.html#dynamic1">
specification of λδ version 1 for Matita 0.4</a>
is online.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <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>
+ <span class="emph gamma">November 2006.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldR1b">λδ version 1</a>
is released.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <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>.
+ <span class="emph beta">December 2005.</span>
+ <a href="http://lambdadelta.info/documentation.html#ldP1a">First communication on λδ version 1</a>.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <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>
+ <span class="emph alpha">May 2004.</span>
+ The specification of <a href="http://lambdadelta.info/specification.html#v1">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 xmlns:ld="http://lambdadelta.info/" class="head2dx" id="visibility">Visibility <img class="icon37" alt="[butterfly]" title="\lambda\delta butterfly" src="http://lambdadelta.info/images/b3.png" />
</div>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">June 2014.</span>
+ <span class="emph alpha">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.
+ 5 resources about the λδ family in the first 6 results.
</li>
</ul>
-
- <ul xmlns:ld="http://lambdadelta.info/">
+ <ul xmlns:ld="http://lambdadelta.info/">
<li>
- <span class="date">June 2014.</span>
+ <span class="emph alpha">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.
+ 4 resources about the λδ family 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 class="spacer">
+ <img class="rule" alt="[Spacer]" title="\lambda\delta rainbow rule" src="http://lambdadelta.info/images/rainbow.png" />
</div>
<div xmlns:ld="http://lambdadelta.info/" class="spacer">
<br />
<div xmlns:ld="http://lambdadelta.info/" class="spacer">
<br />
</div>
- <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Tue, 14 Oct 2014 00:04:55 +0200</div>
-</body>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Fri, 24 Nov 2017 21:00:00 +0100</div>
+ </body>
</html>
projects / helm.git / blobdiff