-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
- <head>
- <meta content="text/html; charset=UTF-8" http-equiv="content-type">
- <title>lambda_delta home page</title>
- <meta content="Ferruccio Guidi" name="author">
- <meta content="The formal system lambda_delta" name="description">
- <link rel="shortcut icon" href="download/crux_16.ico">
- </head>
- <body>
- <div style="text-align: center;">
- <br>
- <a href="http://lambda-delta.info"><img alt="[Crux Logo]"
- title="The Crux" src="download/crux_32.png" style="border: 0px
- solid ; width: 32px; height: 32px;"></a>
- <h1>The Formal System λδ (lambda_delta)<br>
- </h1>
- <h2>Towards the unification of terms, types, environments and
- contexts</h2>
- <img style="width: 95%; height: 4px;" alt="[Separator]"
- title="Separator" src="download/rainbow.png"><br>
- <table style="text-align: left; width: 95%; margin-left: auto;
- margin-right: auto;" border="0" cellpadding="2" cellspacing="20">
- <tbody>
- <tr>
- <td style="vertical-align: top;">
- <ul>
- <li><a href="index.html">Foreword</a></li>
- </ul>
- <ul>
- <li>News</li>
- </ul>
- <ul>
- <li><a href="documentation.html">Papers</a></li>
- </ul>
- <ul>
- <li><a href="implementation.html">Resources</a><br>
- </li>
- </ul>
- </td>
- <td style="vertical-align: top; text-align: left;">
- <h3 style="text-align: right;">News <img style="width:
- 37px; height: 37px;" alt="[Butterfly]"
- title="Butterfly" src="download/b5.png"></h3>
- <ul>
- <li><span style="font-weight: bold;">September 2011.</span>
- The
- denomination "lambda-delta" changes to "lambda_delta".
- <ul>
- <li>The character "-" is reserved in λδ textual syntax
- (recognized by <span style="font-style: italic;">Helena
- 0.8.1</span>).
- </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>
- <li>The permanent λδ URL is sheduled to become <span
- style="font-style: italic;">http://lambda_delta.info</span>
- on
- December 2012.<br>
- </li>
- </ul></li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">April 2011.</span>
- The
- specification of λδ version 2 and related topics is
- restarted in <a href="http://matita.cs.unibo.it/">Matita
- 0.5</a>.
- <ul>
- <li><a href="apps_2.html">Here</a> is a page about
- the
- topics related to the specification (Applications).</li>
- <li><a href="basic_2.html">Here</a> is a page about
- the
- specification (Core).
- </li>
- </ul></li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">December 2010.</span>
- Permanent λδ URL acquired: <a
- href="http://lambda-delta.info">http://lambda-delta.info</a>
- (pointing at this site). <br>
- <span style="font-weight: bold;"></span></li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">November 2010.</span>
- <span style="font-style: italic;">Helena 0.8.1</span>
- is released. <br>
- </li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">September 2009.</span>
- <span style="font-style: italic;">Helena 0.8.0</span>
- is released and the <a
- href="implementation.html#lddl">λδ Digital Library</a>
- is
- started.<br>
- <span style="font-weight: bold;"></span></li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">June 2009.</span> <span
- style="font-style: italic;">Helena</span>, a <a
- href="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. <br>
- </li>
- </ul>
- <span style="font-weight: bold;"></span>
- <ul>
- <li><span style="font-weight: bold;">September 2008.</span>
- This site is online.<br>
- </li>
- </ul>
- <span style="font-weight: bold;"></span>
- <ul>
- <li><span style="font-weight: bold;">July 2008.</span> <a
- href="documentation.html#ldp5">First journal paper
- on λδ</a> accepted
- for publication.</li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">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 <a href="implementation.html#ldp1">λδ proof
- scripts for
- Coq 7.3.1</a>.<br>
- </li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">June 2008.</span>
- The <a href="implementation.html#static">HTML
- pages of the specification of λδ version 1 for
- Matita 0.5</a> are
- online.<br>
- <span style="font-weight: bold;"></span></li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">March 2008.</span>
- The
- specification of λδ version 2 is started with Coq
- 7.3.1 (false start).
- <!-- <ul>
+<head>
+ <meta content="text/html; charset=UTF-8" http-equiv="content-type">
+ <title>lambda_delta home page</title>
+ <meta content="Ferruccio Guidi" name="author">
+ <meta content="The formal system lambda_delta" name="description">
+ <link rel="shortcut icon" href="download/crux_16.ico">
+</head>
+<body>
+<div style="text-align: center;"> <br>
+<a href="http://lambda-delta.info"><img alt="[Crux Logo]"
+ title="The Crux" src="download/crux_32.png"
+ style="border: 0px solid ; width: 32px; height: 32px;"></a>
+<h1>The Formal System λδ (lambda_delta)<br>
+</h1>
+<h2>Towards the unification of terms, types, environments and contexts</h2>
+<img style="width: 95%; height: 4px;" alt="[Separator]"
+ title="Separator" src="download/rainbow.png"><br>
+<table
+ style="text-align: left; width: 95%; margin-left: auto; margin-right: auto;"
+ border="0" cellpadding="2" cellspacing="20">
+ <tbody>
+ <tr>
+ <td style="vertical-align: top;">
+ <ul>
+ <li><a href="index.html">Foreword</a></li>
+ </ul>
+ <ul>
+ <li>News</li>
+ </ul>
+ <ul>
+ <li><a href="documentation.html">Papers</a></li>
+ </ul>
+ <ul>
+ <li><a href="implementation.html">Resources</a><br>
+ </li>
+ </ul>
+ </td>
+ <td style="vertical-align: top; text-align: left;">
+ <h3 style="text-align: right;">News <img
+ style="width: 37px; height: 37px;" alt="[Butterfly]" title="Butterfly"
+ src="download/b5.png"></h3>
+ <ul>
+ <li><span style="font-weight: bold;">September 2011.</span> The
+denomination "lambda-delta" changes to "lambda_delta".
+ <ul>
+ <li>The character "-" is reserved in λδ textual syntax
+(recognized by <span style="font-style: italic;">Helena 0.8.1</span>).
+ </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>
+ <li>The permanent λδ URL is sheduled to become <span
+ style="font-style: italic;">http://lambda_delta.info</span> on
+December 2012.<br>
+ </li>
+ </ul>
+ </li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">April 2011.</span> The
+specification of λδ version 2 and related topics is restarted in <a
+ href="http://matita.cs.unibo.it/">Matita 0.5</a>.
+ <ul>
+ <li><a href="apps_2.html">Here</a> is a page about the
+topics related to the specification (Applications).</li>
+ <li><a href="basic_2.html">Here</a> is a page about the
+specification (Core). </li>
+ </ul>
+ </li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">December 2010.</span>
+Permanent λδ URL acquired: <a href="http://lambda-delta.info">http://lambda-delta.info</a>
+(pointing at this site). <br>
+ <span style="font-weight: bold;"></span></li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">November 2010.</span> <span
+ style="font-style: italic;">Helena 0.8.1</span> is released. <br>
+ </li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">September 2009.</span> <span
+ style="font-style: italic;">Helena 0.8.0</span> is released and the <a
+ href="implementation.html#lddl">λδ Digital Library</a> is started.<br>
+ <span style="font-weight: bold;"></span></li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">June 2009.</span> <span
+ style="font-style: italic;">Helena</span>, a <a
+ href="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. <br>
+ </li>
+ </ul>
+ <span style="font-weight: bold;"></span>
+ <ul>
+ <li><span style="font-weight: bold;">September 2008.</span>
+This site is online.<br>
+ </li>
+ </ul>
+ <span style="font-weight: bold;"></span>
+ <ul>
+ <li><span style="font-weight: bold;">July 2008.</span> <a
+ href="documentation.html#ldp5">First journal paper on λδ</a> accepted
+for publication.</li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">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 <a
+ href="implementation.html#ldp1">λδ proof scripts for Coq 7.3.1</a>.<br>
+ </li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">June 2008.</span> The <a
+ href="implementation.html#static">HTML pages of the specification of
+λδ version 1 for Matita 0.5</a> are online.<br>
+ <span style="font-weight: bold;"></span></li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">May 2008.</span> The
+specification of λδ version 1 is closed.<br>
+ <span style="font-weight: bold;"></span></li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">March 2008.</span> The
+specification of λδ version 2 is started with Coq 7.3.1 (false start). </li>
+ </ul>
+<!-- <ul>
<li>native type assignment with new rules for application: <span
style="font-style: italic;">nty</span> (it replaces <span
style="font-style: italic;">ty3</span>);<br>
<li>we removed level indicators on environments (<span
style="font-style: italic;">cbk</span>).</li>
</ul>
---> </li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">September 2007.</span>
- The <a href="implementation.html#dynamic">specification
- of λδ version
- 1 for
- Matita 0.4</a> is online.</li>
- </ul>
- <ul>
- <li><span style="font-weight: bold;">November 2006.</span>
- <a href="documentation.html#ldp3">λδ version
- 1</a> is released.</li>
- </ul>
- <ul>
- <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="download/b4.png"></h3>
- <ul>
- <li><span style="font-weight: bold;">February 2012.</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;">February 2012.</span>
- The <a href="http://www.yahoo.com/">Yahoo</a>
- search <span style="color: rgb(255, 0, 0);">formal
- system lambda delta</span>
- gives this site as the first result.</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
+-->
+ <ul>
+ <li><span style="font-weight: bold;">September 2007.</span> The
+ <a href="implementation.html#dynamic">specification of λδ
+version 1 for Matita 0.4</a> is online.</li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">November 2006.</span> <a
+ href="documentation.html#ldp3">λδ version 1</a> is released.</li>
+ </ul>
+ <ul>
+ <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="download/b4.png"></h3>
+ <ul>
+ <li><span style="font-weight: bold;">February 2012.</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;">February 2012.</span> The <a
+ href="http://www.yahoo.com/">Yahoo</a> search <span
+ style="color: rgb(255, 0, 0);">formal system lambda delta</span> gives
+this site as the first result.</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="download/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="download/PNGnow2.png"><br>
- <br>
- Last update 2012-04-16 by <a
- href="http://www.cs.unibo.it/%7Efguidi/">Ferruccio
- Guidi</a><br>
- </div>
- </body>
+ src="download/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="download/PNGnow2.png"><br>
+<br>
+Last update 2012-11-20 by <a href="http://www.cs.unibo.it/%7Efguidi/">Ferruccio
+
+Guidi</a><br>
+</div>
+</body>
</html>
projects / helm.git / commitdiff