1 <?xml version="1.0" encoding="UTF-8"?>
3 <page xmlns="http://lambdadelta.info/"
4 description = "\lambda\delta home page"
5 title = "\lambda\delta home page"
6 head = "The Formal System λδ (\lambda\delta)"
8 <sitemap name="sitemap"/>
10 <!-- ===================================================================== -->
12 <section3 name="milestones">Milestones</section3>
14 <news class="beta" date="July 2014.">
15 A new version of this site is online.
18 <news class="beta" date="June 2014.">
19 <rlink to="documentation.html#ldP8">First communication on λδ version 2.</rlink>
22 <news class="alpha" date="December 2012.">
23 The character "_" is removed from the denomination "lambda_delta":
25 The denomination "\lambda\delta" is used in λδ-related texts.
27 The denomination "lambdadelta" is used in λδ-related identifiers.
29 Permanent λδ URL acquired:
30 <rlink to="">http://lambdadelta.info/</rlink>
31 (pointing at this site).
35 <news class="alpha" date="September 2011.">
36 The denomination "lambda-delta" changes to "lambda_delta":
38 The character "-" is reserved in λδ textual syntax
39 (recognized by "Helena 0.8.1").
41 Eventually, the occurrences of the character "-"
42 will be replaced by "_" in all λδ-related identifiers.
44 In particular, this refactoring involves file names and path names.
48 <news class="alpha" date="April 2011.">
49 The specification of <rlink to="version_2.html">λδ version 2</rlink>
50 and related topics is restarted in
51 <link to="http://matita.cs.unibo.it/">Matita 0.5</link>.
54 <news class="delta" date="February 2011.">
55 The specification of λδ version 2 with Coq 7.3.1 is abandoned.
58 <news class="alpha" date="December 2010.">
59 Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
62 <news class="beta" date="November 2010.">
63 "Helena 0.8.1" is released.
66 <news class="beta" date="September 2009.">
67 "Helena 0.8.0" is released and the
68 <rlink to="implementation.html#lddl">λδ Digital Library</rlink>
72 <news class="alpha" date="June 2009.">
73 "Helena", a <rlink to="implementation.html#helena">validator for λδ version 2</rlink>,
74 is available as a part of the <link to="http://helm.cs.unibo.it/">HELM</link> software.
77 <news class="alpha" date="September 2008.">
81 <news class="delta" date="July 2008.">
82 <rlink to="documentation.html#ldJ1">First journal paper on λδ</rlink>
83 accepted for publication.
86 <news class="delta" date="July 2008.">
87 First <link to="http://helm.cs.unibo.it/procedural/">procedural reconstruction</link>
88 for <link to="http://matita.cs.unibo.it/">Matita 0.5</link>
89 of the λδ version 1 for Coq 7.3.1.
92 <news class="delta" date="June 2008.">
93 The <rlink to="version_1.html#static">
94 HTML pages of the specification of λδ version 1 for Matita 0.5</rlink>
98 <news class="delta" date="May 2008.">
99 The specification of λδ version 1 is concluded.
102 <news class="alpha" date="March 2008.">
103 The specification of λδ version 2 is started with Coq 7.3.1 (false start).
106 <news class="gamma" date="September 2007.">
107 The <rlink to="version_1.html#dynamic">
108 specification of λδ version 1 for Matita 0.4</rlink>
112 <news class="gamma" date="November 2006.">
113 <rlink to="documentation.html#ldR2">λδ version 1</rlink>
117 <news class="beta" date="December 2005.">
118 <rlink to="documentation.html#ldP1">First communication on λδ version 1</rlink>.
121 <news class="alpha" date="May 2004.">
122 The specification of <rlink to="version_1.html">λδ version 1</rlink>
123 is started with Coq 7.3.1.
126 <!-- ===================================================================== -->
128 <section3 name="visibility">Visibility</section3>
130 <news class="alpha" date="June 2014.">
131 The <link to="http://www.google.com/">Google</link>
132 search for "formal system lambda delta" gives
133 5 resources about λδ in the first 6 results.
136 <news class="alpha" date="June 2014.">
137 The <link to="http://www.yahoo.com/">Yahoo</link>
138 search for "formal system lambda delta" gives
139 4 resources about λδ in the first 5 results.