<page xmlns="http://lambdadelta.info/"
description = "\lambda\delta home page"
title = "\lambda\delta home page"
- head = "The Formal System λδ (\lambda\delta)"
+ logo = "crux"
+ head = "The Formal Systems of the λδ (\lambda\delta) Family"
>
<sitemap name="sitemap"/>
<section3 name="milestones">Milestones</section3>
- <news date="July 2014.">
+ <news class="alpha" date="December 2015.">
+ <rlink to="html/documentation.html#ldJ3a">Second journal paper on λδ</rlink>
+ accepted for publication.
+ </news>
+
+ <news class="gamma" date="December 2015.">
+ <rlink to="html/implementation.html#v3">"Helena 0.8.3"</rlink> is released.
+ </news>
+
+ <news class="delta" date="August 2015.">
+ The specification of λδ version 2A1 is concluded.
+ </news>
+
+ <news class="gamma" date="June 2015.">
+ The corrected specification of Landau's "Grundlagen der Analysis"
+ is validated in a λProlog implementation of λδ version 3.
+ </news>
+
+ <news class="delta" date="March 2015.">
+ The specification of λδ version 1 is validated by
+ <link to="http://matita.cs.unibo.it/">Matita 0.99.2</link>.
+ </news>
+
+ <news class="gamma" date="February 2015.">
+ <rlink to="html/implementation.html#v2">"Helena 0.8.2"</rlink> is updated.
+ <list><item>
+ The translated specification of Landau's "Grundlagen der Analysis"
+ is validated in CC by <link to="http://coq.inria.fr/">Coq 8.4.3</link>.
+ </item></list>
+ </news>
+
+ <news class="delta" date="January 2015.">
+ The specification of <rlink to="html/specification.html#v1">λδ version 1</rlink>
+ is updated with backports from the abandoned specification of λδ version 2.
+ </news>
+
+ <news class="gamma" date="December 2014.">
+ <rlink to="html/implementation.html#v2">"Helena 0.8.2"</rlink> is released.
+ <list><item>
+ The corrected specification of Landau's "Grundlagen der Analysis"
+ is validated in λδ version 3.
+ </item></list>
+ </news>
+
+ <news class="gamma" date="October 2014.">
+ <rlink to="html/documentation.html#ldJ2a">λδ version 2A1</rlink>
+ is released.
+ </news>
+
+ <news class="beta" date="July 2014.">
A new version of this site is online.
</news>
- <news date="June 2014.">
- <rlink to="documentation.html#ldP8">First communication on λδ version 2.</rlink>
+ <news class="beta" date="June 2014.">
+ <rlink to="html/documentation.html#ldP2c">First communication on λδ version 2.</rlink>
</news>
- <news date="December 2012.">
+ <news class="alpha" date="December 2012.">
The character "_" is removed from the denomination "lambda_delta":
<list><item>
The denomination "\lambda\delta" is used in λδ-related texts.
</item></list>
</news>
- <news date="September 2011.">
+ <news class="alpha" date="September 2011.">
The denomination "lambda-delta" changes to "lambda_delta":
<list><item>
The character "-" is reserved in λδ textual syntax
</item></list>
</news>
- <news date="April 2011.">
- The specification of <rlink to="version_2.html">λδ version 2</rlink>
+ <news class="alpha" date="April 2011.">
+ The specification of <rlink to="html/specification.html#v2">λδ version 2</rlink>
and related topics is restarted in
<link to="http://matita.cs.unibo.it/">Matita 0.5</link>.
</news>
- <news date="December 2010.">
+ <news class="delta" date="February 2011.">
+ The specification of λδ version 2 with Coq 7.3.1 is abandoned.
+ </news>
+
+ <news class="alpha" date="December 2010.">
Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
</news>
- <news date="November 2010.">
- "Helena 0.8.1" is released.
+ <news class="beta" date="November 2010.">
+ <rlink to="html/implementation.html#v1">"Helena 0.8.1"</rlink> is released.
</news>
- <news date="September 2009.">
- "Helena 0.8.0" is released and the
- <rlink to="implementation.html#lddl">λδ Digital Library</rlink>
- is started.
+ <news class="beta" date="September 2009.">
+ <rlink to="html/implementation.html#v0">"Helena 0.8.0"</rlink> is released and the
+ <rlink to="html/implementation.html#lddl">λδ Digital Library</rlink> is started.
</news>
- <news date="June 2009.">
- "Helena", a <rlink to="implementation.html#helena">validator for λδ version 2</rlink>,
+ <news class="alpha" date="June 2009.">
+ "Helena", a <rlink to="html/implementation.html#helena">validator for λδ version 2</rlink>,
is available as a part of the <link to="http://helm.cs.unibo.it/">HELM</link> software.
</news>
- <news date="September 2008.">
+ <news class="alpha" date="September 2008.">
This site is online.
</news>
- <news date="July 2008.">
- <rlink to="documentation.html#ldJ1">First journal paper on λδ</rlink>
+ <news class="delta" date="July 2008.">
+ <rlink to="html/documentation.html#ldJ1a">First journal paper on λδ</rlink>
accepted for publication.
</news>
- <news date="July 2008.">
+ <news class="delta" date="July 2008.">
First <link to="http://helm.cs.unibo.it/procedural/">procedural reconstruction</link>
for <link to="http://matita.cs.unibo.it/">Matita 0.5</link>
of the λδ version 1 for Coq 7.3.1.
</news>
- <news date="June 2008.">
- The <rlink to="version_1.html#static">
+ <news class="delta" date="June 2008.">
+ The <rlink to="html/specification.html#static1">
HTML pages of the specification of λδ version 1 for Matita 0.5</rlink>
are online.
</news>
- <news date="May 2008.">
- The specification of λδ version 1 is dismissed.
+ <news class="delta" date="May 2008.">
+ The specification of λδ version 1 is concluded.
</news>
- <news date="March 2008.">
+ <news class="alpha" date="March 2008.">
The specification of λδ version 2 is started with Coq 7.3.1 (false start).
</news>
- <news date="September 2007.">
- The <rlink to="version_1.html#dynamic">
+ <news class="gamma" date="September 2007.">
+ The <rlink to="html/specification.html#dynamic1">
specification of λδ version 1 for Matita 0.4</rlink>
is online.
</news>
- <news date="November 2006.">
- <rlink to="documentation.html#ldR2">λδ version 1</rlink>
+ <news class="gamma" date="November 2006.">
+ <rlink to="html/documentation.html#ldR1b">λδ version 1</rlink>
is released.
</news>
- <news date="December 2005.">
- <rlink to="documentation.html#ldP1">First communication on λδ version 1</rlink>.
+ <news class="beta" date="December 2005.">
+ <rlink to="html/documentation.html#ldP1a">First communication on λδ version 1</rlink>.
</news>
- <news date="May 2004.">
- The specification of <rlink to="version_1.html">λδ version 1</rlink>
+ <news class="alpha" date="May 2004.">
+ The specification of <rlink to="html/specification.html#v1">λδ version 1</rlink>
is started with Coq 7.3.1.
</news>
-<!-- ===================================================================== -->
-
- <section3 name="citations">Citations</section3>
- <body>
- Here is a list of publications citing λδ (not including our own).
- </body>
-
- <topitem name="C6">
- A. Asperti, W. Ricciotti, C. Sacerdoti Coen, E. Tassi:
- <date date="Formal metatheory of programming languages in the Matita interactive theorem prover"/>
- (2012). In JAR 49(3), pp. 427-451.
- </topitem>
-
- <topitem name="C5">
- M.E. Maietti:
- <date date="Consistency of the minimalist foundation with Church thesis and Bar Induction"/>
- (2012). Submitted article.
- </topitem>
-
- <topitem name="C4">
- W. Ricciotti:
- <date date="Theoretical and implementation aspects in the mechanization of the metatheory of programming languages"/>
- (July 2011). Ph.D. Thesis in Computer Science, Technical Report UBLCS-2011-09, University of Bologna.
- </topitem>
-
- <topitem name="C3">
- C.E. Brown:
- <date date="Faithful Reproductions of the Automath Landau Formalization"/>
- (2011). Typescript note.
- </topitem>
-
- <topitem name="C2">
- M.E. Maietti:
- <date date="A minimalist two-level foundation for constructive mathematics"/>
- (2009). In APAL 160(3), pp. 319-354.
- </topitem>
-
- <topitem name="C1">
- V. Rahili:
- <date date="First Year Report: Realisability methods of proof and semantics with application to expansion"/>
- (July 2007). Typescript note.
- </topitem>
-
<!-- ===================================================================== -->
<section3 name="visibility">Visibility</section3>
- <news date="June 2014.">
+ <news class="alpha" date="June 2014.">
The <link to="http://www.google.com/">Google</link>
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.
</news>
- <news date="June 2014.">
+ <news class="alpha" date="June 2014.">
The <link to="http://www.yahoo.com/">Yahoo</link>
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.
</news>
<footer/>
projects / helm.git / blobdiff