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- <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" />
</div>
<td class="snns capitalize italic magenta">
<a href="http://lambdadelta.info/news.html">news</a>
</td>
- <td class="snns capitalize italic orange">
- <a href="http://lambdadelta.info/documentation.html">documentation</a>
- </td>
- <td class="snns capitalize italic green">
+ <td class="snns capitalize italic white">
<a href="http://lambdadelta.info/specification.html">specification</a>
</td>
- <td class="snnn capitalize italic green">
+ <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/implementation.html">implementation</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>
- </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="snns capitalize green">
<a href="http://lambdadelta.info/implementation.html#lddl">library</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">(<a href="http://lambdadelta.info/static/matita/lambdadelta/">static HELM directory</a>)</td>
<td class="snss capitalize green">
<a href="http://lambdadelta.info/implementation.html#helena">helena</a>
</td>
</tbody>
</table>
</div>
- <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="specifications">Computer-checked formal specifications <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b5.png" />
+ <div xmlns:ld="http://lambdadelta.info/" class="head2dx" id="specifications">Computer-checked formal specifications <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b15.png" />
</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
- λδ is developed as a machine-checked digital specification.
- It comes in several versions listed in the next table,
- which includes the major milestones.
+ The systems of the λδ family are developed as machine-checked digital specifications,
+ and are listed in the next table, which includes the major milestones.
</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
The life cycle of a specification consists of four periods.
<td class="snnn top capitalize italic gray">started</td>
<td class="snnn top capitalize italic gray">announced</td>
<td class="snnn top capitalize italic gray">released</td>
- <td class="ssnn top capitalize italic gray">concluded</td>
+ <td class="snnn top capitalize italic gray">concluded</td>
+ <td class="ssnn top capitalize italic gray">references</td>
+ </tr>
+ <tr>
+ <td class="snns top yellow">
+ <a href="http://lambdadelta.info/specification.html#v3">Version 3</a>
+ </td>
+ <td class="snnn top yellow">"basic_3"</td>
+ <td class="snnn top yellow" />
+ <td class="snnn top yellow" />
+ <td class="snnn top yellow" />
+ <td class="snnn top yellow" />
+ <td class="snnn top yellow" />
+ <td class="snnn top yellow" />
+ <td class="ssnn top yellow">
+ <a href="http://lambdadelta.info/documentation#ldJ3a">J3a</a>
+ </td>
</tr>
<tr>
<td class="snns top orange">
<td class="snnn top orange">
<a href="http://matita.cs.unibo.it/">Matita 0.99.2</a>
</td>
- <td class="snnn top orange">"A"</td>
+ <td class="snns top orange">"A2"</td>
+ <td class="snnn top orange">October 2015</td>
+ <td class="snnn top orange" />
+ <td class="snnn top orange" />
+ <td class="snnn top orange" />
+ <td class="ssnn top orange">
+ <br />
+ </td>
+ </tr>
+ <tr>
+ <td class="nnns top orange">
+ <br />
+ </td>
+ <td class="nnnn top orange">
+ <br />
+ </td>
+ <td class="nnnn top orange">
+ <br />
+ </td>
+ <td class="snns top orange">"A1"</td>
<td class="snnn top orange">April 2011</td>
<td class="snnn top orange">June 2014</td>
<td class="snnn top orange">October 2014</td>
- <td class="ssnn top orange" />
+ <td class="snnn top orange">August 2015</td>
+ <td class="ssnn top orange">
+ <a href="http://lambdadelta.info/documentation#ldV2a">V2a</a>
+ <a href="http://lambdadelta.info/documentation#ldR2c">R2c</a>
+ </td>
</tr>
<tr>
<td class="snns top orange">Abandoned</td>
<td class="snnn top orange">March 2008</td>
<td class="snnn top orange" />
<td class="snnn top orange" />
- <td class="ssnn top orange">February 2011</td>
+ <td class="snnn top orange">February 2011</td>
+ <td class="ssnn top orange">
+ <br />
+ </td>
</tr>
<tr>
<td class="snss top red">
<td class="snsn top red">May 2004</td>
<td class="snsn top red">December 2005</td>
<td class="snsn top red">November 2006</td>
- <td class="sssn top red">May 2008</td>
+ <td class="snsn top red">May 2008</td>
+ <td class="sssn top red">
+ <a href="http://lambdadelta.info/documentation#ldV1a">V1a</a>
+ <a href="http://lambdadelta.info/documentation#ldJ1a">J1a</a>
+ </td>
</tr>
</tbody>
</table>
</div>
+ <div xmlns:ld="http://lambdadelta.info/" class="text">
+ Informational pages on the specifications are provided.
+ </div>
+ <ul xmlns:ld="http://lambdadelta.info/" id="notice1">
+ <li>
+ <span class="emph alpha">Notice on displayed numerical acounts:</span>
+ nodes are counted according to the "intrinsic complexity measure"
+ [F. Guidi: "Procedural Representation of CIC Proof Terms"
+ Journal of Automated Reasoning 44(1-2), Springer (February 2010), pp. 53-78].
+ </li>
+ </ul>
+ <ul xmlns:ld="http://lambdadelta.info/" id="notice2">
+ <li>
+ <span class="emph alpha">Notice on displayed logical structures:</span>
+ from the logical standpoint, the source scripts are grouped in "planes"
+ and these are grouped in "components";
+ the notation for the relations or functions
+ introduced in each script, is shown in parentheses (? are placeholders).
+ </li>
+ </ul>
+ <!-- VERSION 3 =========================================================== -->
+ <div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="v3">
+ <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b8.png" /> λδ version 3 (proposed)</div>
+ <div xmlns:ld="http://lambdadelta.info/" class="text">
+ The formal specification of λδ version 3
+ is forthcoming.
+ </div>
<!-- VERSION 2 =========================================================== -->
<div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="v2">
<img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b4.png" /> λδ version 2 (active)</div>
<ul xmlns:ld="http://lambdadelta.info/" id="source2">
<li>
<div class="text">
- <a href="http://lambdadelta.info/download/lambdadelta_2.tar.gz">lambdadelta_2 for Matita 0.99.2</a>
+ <a href="http://lambdadelta.info/download/lambdadelta_2A1.tar.gz">lambdadelta_2A1 for Matita 0.99.2</a>
(revised <span class="emph gamma">2014-10</span>).
Source scripts.
+ <a href="http://lambdadelta.info/documentation.html#ldR2c">Documentation (R2c)</a>.
</div>
<div class="text">
The scripts are grouped in directories, first by part, then by component.
<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>.
- </div>
- <div xmlns:ld="http://lambdadelta.info/" class="text">
- <span class="emph alpha">Notice on numerical acounts:</span>
- nodes are counted according to the "intrinsic complexity measure"
- [F. Guidi: "Procedural Representation of CIC Proof Terms"
- Journal of Automated Reasoning 44(1-2), Springer (February 2010), pp. 53-78].
- </div>
- <div xmlns:ld="http://lambdadelta.info/" class="text">
- <span class="emph alpha">Notice on displayed logical structures:</span>
- from the logical standpoint, the source scripts are grouped in "planes"
- and these are grouped in "components";
- the notation for the relations or functions
- introduced in each script, is shown in parentheses (? are placeholders).
</div>
<!-- VERSION 1 =========================================================== -->
<div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="v1">
<li>
<div class="text">
<a href="http://lambdadelta.info/download/lambdadelta_1.tar.gz">lambdadelta_1 for Coq 7.3.1</a>
- (revised <span class="emph delta">2015-01</span>).
+ (revised <span class="emph delta">2015-09</span>).
Source scripts.
+ <a href="http://lambdadelta.info/documentation.html#ldJ1a">Documentation (J1a)</a>.
<ul>
<li>
<span class="emph delta">2015 January 15.</span>
<span class="emph alpha">Notice: the HELM rendering engine is offline.</span>
</li>
</ul>
+ <div xmlns:ld="http://lambdadelta.info/" class="text">
+ Informational pages on the parts of the specification:
+ <a href="http://lambdadelta.info/ground_1.html">Background</a>,
+ <a href="http://lambdadelta.info/basic_1.html">Core</a>.
+ </div>
<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">Last update: Thu, 15 Jan 2015 16:59:16 +0100</div>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Fri, 01 Apr 2016 23:30:52 +0200</div>
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