</tr>
<tr>
<td class="snss capitalize sky">
- <a href="http://lambdadelta.info/index.html#notice">notice</a>
+ <a href="http://lambdadelta.info/index.html#citations">citations</a>
</td>
<td class="snss capitalize magenta">
- <a href="http://lambdadelta.info/news.html#citations">citations</a>
+ <a href="http://lambdadelta.info/news.html#visibility">visibility</a>
</td>
<td class="snss capitalize orange">
<a href="http://lambdadelta.info/documentation.html#v1">version 1</a>
<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:
+ which includes the major milestones.
+ </div>
+ <div xmlns:ld="http://lambdadelta.info/" class="text">
+ The life cycle of a specification consists of four periods.
+ <span class="emph alpha">Alpha:</span>
+ the definitions are designed and the major propositions are proved,
+ then the calculus is announced with a presentation.
+ <span class="emph beta">Beta:</span>
+ major changes and additions may occur before the calculus is released on paper.
+ <span class="emph gamma">Gamma:</span>
+ subsequent improvements occur until the specification is completed or superseded,
+ while major changes and additions are announced and reported on paper.
+ <span class="emph delta">Delta:</span>
+ after its conclusion, the specification is modified just for maintenance.
</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
<table cellpadding="4" cellspacing="0">
<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">dismissed</td>
+ <td class="ssnn top capitalize italic gray">concluded</td>
</tr>
<tr>
<td class="snns top orange">
<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">No</td>
+ <td class="ssnn top orange" />
+ </tr>
+ <tr>
+ <td class="snns top orange">Abandoned</td>
+ <td class="snnn top orange" />
+ <td class="snnn top orange">
+ <a href="http://coq.inria.fr/">Coq 7.3.1</a>
+ </td>
+ <td class="snnn top orange" />
+ <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>
</tr>
<tr>
<td class="snss top red">
<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 (ongoing)</div>
+ <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b4.png" /> λδ version 2 (active)</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
The formal specification of λδ version 2
is available in the following formats:
<li>
<div class="text">
<a href="http://lambdadelta.info/download/lambdadelta_2.tar.gz">lambdadelta_2 for Matita 0.99.2</a>
- (revised <span class="date">2014-10</span>).
+ (revised <span class="emph gamma">2014-10</span>).
Source scripts.
</div>
<div class="text">
The scripts are grouped in directories, first by part, then by component.
</div>
<div class="text">
- <span class="date">Notice:</span>
+ <span class="emph alpha">Notice:</span>
the scripts are checked by the latest version of Matita from
<a href="http://matita.cs.unibo.it/download.shtml">HELM Subversion repository</a>
at path <trunk/matita/>.
<a href="http://lambdadelta.info/apps_2.html">Applications</a>.
</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
- <span class="date">Notice on numerical acounts:</span>
+ <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>
<div xmlns:ld="http://lambdadelta.info/" class="head3sn" id="v1">
- <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b6.png" /> λδ version 1 (dismissed)</div>
+ <img class="icon37" alt="[spacer]" title="lambdadelta butterfly" src="http://lambdadelta.info/images/b6.png" /> λδ version 1 (superseded)</div>
<div xmlns:ld="http://lambdadelta.info/" class="text">
The formal specification of λδ version 1
is available in the following formats:
<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="date">2012-10</span>).
+ (revised <span class="emph delta">2012-10</span>).
Source scripts.
</div>
<div class="text">
<ul xmlns:ld="http://lambdadelta.info/" id="static1">
<li>
<a href="http://lambdadelta.info/static/matita/lambdadelta/">lambdadelta_1 for Matita 0.5</a>
- (revised <span class="date">2011-09</span>).
+ (revised <span class="emph delta">2011-09</span>).
Static HTML pages generated by the <a href="http://helm.cs.unibo.it/">HELM</a> rendering engine.
<ul>
<li>
<li>
<a href="http://mowgli.cs.unibo.it:58080/apply?keys=RT&xmluri=http://helm.cs.unibo.it/helm//html/folder/index.html&prop.media-type=text/html&param.thmedia-type=text/html&param.thkeys=T1%2CT2%2CL%2CE&param.embedkeys=d_c%2CTC1%2CHC2%2CL&param.thencoding=UTF-8&prop.encoding=UTF-8&prop.doctype-public=-//W3C//DTD%20XHTML%201.0%20Transitional//EN&param.doctype-public=-//W3C//DTD%20XHTML%201.0%20Transitional//EN&param.encoding=UTF-8&param.media-type=text/html&param.keys=d_c%2CC1%2CHC2%2CL&profile=default&param.profile=default&param.CICURI=theory:/matita/lambdadelta/">
lambdadelta_1 for Matita 0.5</a>
- (revised <span class="date">2011-09</span>).
+ (revised <span class="emph delta">2011-09</span>).
<a href="http://helm.cs.unibo.it/">HELM</a> directory.
- <span class="date">Notice: the HELM rendering engine is offline.</span>
+ <span class="emph alpha">Notice: the HELM rendering engine is offline.</span>
</li>
</ul>
<div xmlns:ld="http://lambdadelta.info/" class="spacer">
<br />
</div>
- <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Wed, 22 Oct 2014 20:08:56 +0200</div>
+ <div xmlns:ld="http://lambdadelta.info/" class="spacer">Last update: Tue, 28 Oct 2014 17:45:56 +0100</div>
</body>
</html>
projects / helm.git / blobdiff