<page xmlns="http://lambdadelta.info/"
description = "\lambda\delta home page"
title = "\lambda\delta home page"
- head = "The Formal System λδ (\lambda\delta)"
+ head = "The Formal Systems of the λδ (\lambda\delta) Family"
>
<sitemap name="sitemap"/>
- <section5 name="milestones">Milestones</section5>
- <body>
- <news date="June 2014.">
- <rlink to="documentation.html#ldt8">First communication on λδ version 2.</rlink>
- </news>
- <news 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>
- <item>
- The denomination "lambdadelta" is used in λδ-related identifiers.
- </item>
- <item>
- Permanent λδ URL acquired:
- <rlink to="">http://lambdadelta.info/</rlink>
- (pointing at this site).
- </item>
- </list>
- </news>
- <news date="September 2011.">
- The denomination "lambda-delta" changes to "lambda_delta":
- <list>
- <item>
- The character "-" is reserved in λδ textual syntax
- (recognized by "Helena 0.8.1").
- </item>
- <item>
- Eventually, the occurrences of the character "-"
- will be replaced by "_" in all λδ-related identifiers.
- </item>
- <item>
- In particular, this refactoring involves file names and path names.
- </item>
- </list>
- </news>
- <news date="April 2011.">
- The specification of <rlink to="version_2.html">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.">
- Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
- </news>
- <news date="November 2010.">
- "Helena 0.8.1" 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>
- <news date="June 2009.">
- "Helena", a <rlink to="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.">
- This site is online.
- </news>
- <news date="July 2008.">
- <rlink to="documentation.html#ldp5">First journal paper on λδ</rlink>
- accepted for publication.
- </news>
- <news 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">
- 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>
- <news 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">
- specification of λδ version 1 for Matita 0.4</rlink>
- is online.
- </news>
- <news date="November 2006.">
- <rlink to="documentation.html#ldp3">λδ version 1</rlink>
- is released.
- </news>
- <news date="December 2005.">
- <rlink to="documentation.html#ldt1">First communication on λδ</rlink>.
- </news>
- <news date="May 2004.">
- The specification of <rlink to="version_1.html">λδ version 1</rlink>
- is started with Coq 7.3.1.
- </news>
- </body>
-
- <section4 name="visibility">Visibility</section4>
- <body>
- <news 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.
- </news>
- <news 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.
- </news>
- </body>
+<!-- ===================================================================== -->
+
+ <section3 name="milestones">Milestones</section3>
+
+ <news class="gamma" date="December 2015.">
+ <rlink to="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="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="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="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="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 class="beta" date="June 2014.">
+ <rlink to="documentation.html#ldP2c">First communication on λδ version 2.</rlink>
+ </news>
+
+ <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><item>
+ The denomination "lambdadelta" is used in λδ-related identifiers.
+ </item><item>
+ Permanent λδ URL acquired:
+ <rlink to="">http://lambdadelta.info/</rlink>
+ (pointing at this site).
+ </item></list>
+ </news>
+
+ <news class="alpha" date="September 2011.">
+ The denomination "lambda-delta" changes to "lambda_delta":
+ <list><item>
+ The character "-" is reserved in λδ textual syntax
+ (recognized by "Helena 0.8.1").
+ </item><item>
+ Eventually, the occurrences of the character "-"
+ will be replaced by "_" in all λδ-related identifiers.
+ </item><item>
+ In particular, this refactoring involves file names and path names.
+ </item></list>
+ </news>
+
+ <news class="alpha" date="April 2011.">
+ The specification of <rlink to="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 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 class="beta" date="November 2010.">
+ <rlink to="implementation.html#v1">"Helena 0.8.1"</rlink> is released.
+ </news>
+
+ <news class="beta" date="September 2009.">
+ <rlink to="implementation.html#v0">"Helena 0.8.0"</rlink> is released and the
+ <rlink to="implementation.html#lddl">λδ Digital Library</rlink> is started.
+ </news>
+
+ <news class="alpha" date="June 2009.">
+ "Helena", a <rlink to="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 class="alpha" date="September 2008.">
+ This site is online.
+ </news>
+
+ <news class="delta" date="July 2008.">
+ <rlink to="documentation.html#ldJ1a">First journal paper on λδ</rlink>
+ accepted for publication.
+ </news>
+
+ <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 class="delta" date="June 2008.">
+ The <rlink to="specification.html#static1">
+ HTML pages of the specification of λδ version 1 for Matita 0.5</rlink>
+ are online.
+ </news>
+
+ <news class="delta" date="May 2008.">
+ The specification of λδ version 1 is concluded.
+ </news>
+
+ <news class="alpha" date="March 2008.">
+ The specification of λδ version 2 is started with Coq 7.3.1 (false start).
+ </news>
+
+ <news class="gamma" date="September 2007.">
+ The <rlink to="specification.html#dynamic1">
+ specification of λδ version 1 for Matita 0.4</rlink>
+ is online.
+ </news>
+
+ <news class="gamma" date="November 2006.">
+ <rlink to="documentation.html#ldR1b">λδ version 1</rlink>
+ is released.
+ </news>
+
+ <news class="beta" date="December 2005.">
+ <rlink to="documentation.html#ldP1a">First communication on λδ version 1</rlink>.
+ </news>
+
+ <news class="alpha" date="May 2004.">
+ The specification of <rlink to="specification.html#v1">λδ version 1</rlink>
+ is started with Coq 7.3.1.
+ </news>
+
+<!-- ===================================================================== -->
+
+ <section3 name="visibility">Visibility</section3>
+
+ <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 the λδ family in the first 6 results.
+ </news>
+
+ <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 the λδ family in the first 5 results.
+ </news>
<footer/>
</page>
projects / helm.git / blobdiff