<h3 style="text-align: right;">Documentation <img
style="width: 37px; height: 37px;" alt="[Butterfly]" title="Butterfly"
src="images/b5.png"></h3>
-Currently the <span style="font-weight: bold;">main source of
-information</span> on λδ (version 1) is <span
- style="font-weight: bold;">Resource J1</span> below.<br>
-A <span style="font-weight: bold;">summary</span> of basic λδ (version
-1) is found in <span style="font-weight: bold;">Resource P5</span>
-below.<br>
<h3><img style="width: 32px; height: 32px;"
alt="[Basic
lambdadelta Logo]"
title="Basic lambdadelta" src="images/basic_32.png"> Basic λδ version
2 (in progress):</h3>
+The <span style="font-weight: bold;">main source of
+information</span> is <span style="font-weight: bold;">Resource P8</span>.<br>
+ <br>
<table style="text-align: left; width: 100%;" border="0"
cellpadding="2" cellspacing="2">
<tbody>
style="font-style: italic;"></span> (<span style="font-weight: bold;">2010-07</span>).
In
+
<span style="font-style: italic;">CiE 2010 Local Proceedings</span>.
University
-of Azores, CMATI Booklet, pp. 204-213. <a
+of
+Azores, CMATI Booklet, pp. 204-213. <a
href="implementation.html#bibtex">BibTeX entry</a>.<br>
<br>
</td>
Automath to lambda-delta</span></a> (<span style="font-weight: bold;">2009-09)</span>.
University
-of Bologna, technical report UBLCS-2009-16. <a
+of
+Bologna, technical report UBLCS-2009-16. <a
href="implementation.html#bibtex">BibTeX entry</a>.<br>
+ <div style="text-align: left;"><br>
+ </div>
+ </td>
+ </tr>
+ <tr>
+ <td style="vertical-align: top;">P8.<br>
+ </td>
+ <td style="vertical-align: top;"><a name="ldt8"></a>F.Guidi:
+ <a style="font-style: italic;"
+ href="download/ld_talk_8s.pdf">The Formal System λδ and the "Three
+Problems"</a> (<span style="font-weight: bold;">2014-06</span>).
+Presentation at University of Bologna (slides).<br>
<br>
</td>
</tr>
Formal System λδ</span></a> (<span style="font-weight: bold;">2010-07</span>).
Presentation
-at CiE 2010 (slides).<br>
+at
+CiE 2010 (slides).<br>
<br>
</td>
</tr>
Guidi: <a href="download/ld_talk_6s.pdf"><span
style="font-style: italic;">A Validator for the Formal System λδ</span></a>
(revised <span style="font-weight: bold;">2010-02</span>).
-Presentation at the University of Bologna (slides). </td>
+Presentation at University of Bologna (slides). </td>
</tr>
</tbody>
</table>
lambdadelta Logo]"
title="Basic lambdadelta" src="images/basic_32.png"> Basic λδ version
1 (dismissed):</h3>
+The <span style="font-weight: bold;">main source of
+information</span> is <span style="font-weight: bold;">Resource J1</span>.
+A <span style="font-weight: bold;">summary</span> is found in <span
+ style="font-weight: bold;">Resource P5</span>.<br>
+ <br>
<table style="text-align: left; width: 100%;" border="0"
cellpadding="2" cellspacing="2">
<tbody>
Abbreviations</span></a> (<span style="font-weight: bold;">2007-06</span>).
In
+
<span style="font-style: italic;">CiE 2007 Local Proceedings</span>.
University
-of Siena, technical report 487, p. 387 (abstract of a
+of
+Siena, technical report 487, p. 387 (abstract of a
presentation). <a href="implementation.html#bibtex">BibTeX entry</a>.<br>
<br>
</td>
Abbreviations</span></a> (<span style="font-weight: bold;">2006-11</span>).
University
-of Bologna, technical report UBLCS-2006-25. <a
+of
+Bologna, technical report UBLCS-2006-25. <a
href="implementation.html#bibtex">BibTeX entry</a>.<br>
<br>
</td>
href="http://www.informatica.unibo.it/it/ricerca/technical-report/2006/UBLCS-2006-01">Lambda
Types
-on the Lambda Calculus with Abbreviations: a Certified
+on
+the Lambda Calculus with Abbreviations: a Certified
Specification</a> (<span style="font-weight: bold;">2006-01</span>).
University of Bologna, technical report UBLCS-2006-01. <a
href="implementation.html#bibtex">BibTeX entry</a>.<br>
Guidi: <a style="font-style: italic;" href="download/ld_talk_5s.pdf">The
Formal
-System </a><a href="download/cie_2010.pdf"><span
+System
+ </a><a href="download/cie_2010.pdf"><span
style="font-style: italic;">λδ</span></a> (<span
style="font-weight: bold;">2008-10</span>). Presentation at "Advances
in Constructive Topology and Logical Foundations" (slides).<br>
and Contexts</span></a> (<span style="font-weight: bold;">2008-03</span>).
Presentation
-at Types 2008 (slides).<br>
+at
+Types 2008 (slides).<br>
<br>
</td>
</tr>
Abbreviations</span></a> (<span style="font-weight: bold;">2007-06</span>).
Presentation
-at CiE 2007 (slides).<br>
+at
+CiE 2007 (slides).<br>
<br>
</td>
</tr>
Abbreviazioni</span></a> (<span style="font-weight: bold;">2007-01</span>).
Presentation
-at the University of Padova (slides <span style="font-weight: bold;">in
+at
+University of Padova (slides <span style="font-weight: bold;">in
Italian</span>).<br>
<br>
</td>
Guidi: <a href="download/ld_talk_1s.pdf"><span
style="font-style: italic;">Lambda Tipi sul Lambda Calcolo con
Abbreviazioni: una Specifica Certificata</span></a> (<span
- style="font-weight: bold;">2005-12</span>). Presentation at the
-University of Bologna (slides <span style="font-weight: bold;">in
+ style="font-weight: bold;">2005-12</span>). Presentation at University
+of Bologna (slides <span style="font-weight: bold;">in
Italian</span>).<br>
</td>
</tr>
style="width: 88px; height: 31px;" alt="[PNG Used Here]"
title="PNG Used Here]" src="images/PNGnow2.png"><br>
<br>
-Last update 2014-0
2-25 by <a href="http://www.cs.unibo.it/%7Efguidi/">Ferruccio
+Last update 2014-0
6-19 by <a href="http://www.cs.unibo.it/%7Efguidi/">Ferruccio
Guidi</a><br>
</div>
</body>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-<html dir="ltr" lang="en-us"><head>
-
-
-
- <meta content="text/html; charset=UTF-8" http-equiv="content-type"><title>λδ home page</title>
-
+<html dir="ltr" lang="en-us">
+<head>
+ <meta content="text/html; charset=UTF-8" http-equiv="content-type">
+ <title>λδ home page</title>
<meta content="Ferruccio Guidi" name="author">
<meta content="The formal system λδ" name="description">
- <link rel="shortcut icon" href="images/crux_16.ico"></head><body>
+ <link rel="shortcut icon" href="images/crux_16.ico">
+</head>
+<body>
<div style="text-align: center;"> <br>
-<a href="http://lambdadelta.info/"><img alt="[Crux Logo]" title="The Crux" src="images/crux_32.png" style="border: 0px solid ; width: 32px; height: 32px;"></a>
+<a href="http://lambdadelta.info/"><img alt="[Crux Logo]"
+ title="The Crux" src="images/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="images/rainbow.png"><br>
-<table style="text-align: left; width: 95%; margin-left: auto; margin-right: auto;" border="0" cellpadding="2" cellspacing="20">
+<img style="width: 95%; height: 4px;" alt="[Separator]"
+ title="Separator" src="images/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>
</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="images/b5.png"></h3>
+ <h3 style="text-align: right;">News <img
+ style="width: 37px; height: 37px;" alt="[Butterfly]" title="Butterfly"
+ src="images/b5.png"></h3>
+ <ul>
+ <li><span style="font-weight: bold;">June 2014.</span> <a
+ href="documentation.html#ldt8">First communication on λδ version 2.</a><br>
+ <span style="font-weight: bold;"></span></li>
+ </ul>
+ <ul>
+ <li><span style="font-weight: bold;">December 2012.</span> The
+character "_" is removed from the denomination "lambda_delta". </li>
+ </ul>
<ul>
-
- <li><span style="font-weight: bold;">December 2012.</span> The character "_" is removed from the denomination "lambda_delta". <br>
- </li>
<ul>
- <li>The denomination "\lambda\delta" is used in λδ-related texts.</li>
- <li>The denomination "lambdadelta" is used in λδ-related identifiers.</li>
- <li>Permanent λδ URL acquired: <a href="http://lambdadelta.info/">http://lambdadelta.info/</a>
+ <li>The denomination "\lambda\delta" is used in λδ-related
+texts.</li>
+ <li>The denomination "lambdadelta" is used in λδ-related
+identifiers.</li>
+ <li>Permanent λδ URL acquired: <a
+ href="http://lambdadelta.info/">http://lambdadelta.info/</a>
(pointing at this site). </li>
</ul>
-</ul>
+ </ul>
<ul>
<li><span style="font-weight: bold;">September 2011.</span> The
denomination "lambda-delta" changes to "lambda_delta".
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>
<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>.
+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>
</ul>
<ul>
- <li><span style="font-weight: bold;">December 2010.</span> Transient λδ URL acquired: http://lambda-delta.info/
+ <li><span style="font-weight: bold;">December 2010.</span>
+Transient λδ URL acquired: http://lambda-delta.info/
(expires on December 2012). <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><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>
+ <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
+ <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;">July 2008.</span> <a href="documentation.html#ldp5">First journal paper on λδ</a> accepted
+ <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><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
+ <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>
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>
+ <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><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
+ <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>
+ <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;">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
+ <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;">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>
+ <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>
+<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 2013-10-27 by <a href="http://www.cs.unibo.it/%7Efguidi/">Ferruccio
-
+Last update 2014-06-19 by <a href="http://www.cs.unibo.it/%7Efguidi/">Ferruccio
Guidi</a><br>
</div>
-
-</body></html>
+</body>
+</html>
projects / helm.git / commitdiff