<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"/>
- <section5 name="specifications">Computer-checked formal specifications</section5>
+ <section15 name="specifications">Computer-checked formal specifications</section15>
<body>
- λδ is developed as a machine-checked digital specification.
- It comes in several versions listed in the next table,
- which includes the major milestones:
+ The systems of the λδ family are developed as machine-checked digital specifications,
+ and are listed in the next table, which includes the major milestones.
+ </body>
+ <body>
+ The life cycle of a specification consists of four periods.
+ <notice class="alpha" text="Alpha:"/>
+ the definitions are designed and the major propositions are proved,
+ then the calculus is announced with a presentation.
+ <notice class="beta" text="Beta:"/>
+ major changes and additions may occur before the calculus is released on paper.
+ <notice class="gamma" text="Gamma:"/>
+ subsequent improvements occur until the specification is completed or superseded,
+ while major changes and additions are announced and reported on paper.
+ <notice class="delta" text="Delta:"/>
+ after its conclusion, the specification is modified just for maintenance.
</body>
<table name="versions"/>
+ <body>
+ Informational pages on the specifications are provided.
+ </body>
+ <topitem name="notice1">
+ <notice class="alpha" text="Notice on displayed numerical acounts:"/>
+ nodes are counted according to the "intrinsic complexity measure"
+ [F. Guidi: "Procedural Representation of CIC Proof Terms"
+ Journal of Automated Reasoning 44(1-2), Springer (February 2010), pp. 53-78].
+ </topitem>
+ <topitem name="notice2">
+ <notice class="alpha" text="Notice on displayed logical structures:"/>
+ from the logical standpoint, the source scripts are grouped in "planes"
+ and these are grouped in "components";
+ the notation for the relations or functions
+ introduced in each script, is shown in parentheses (? are placeholders).
+ </topitem>
+
+<!-- VERSION 3 =========================================================== -->
+
+ <subsection name="v3"><img logo="ld3"/>λδ version 3 (proposed)</subsection>
+ <body>
+ The formal specification of λδ version 3
+ is forthcoming.
+ </body>
+
<!-- VERSION 2 =========================================================== -->
- <subsection name="v2"><version2-icon/>λδ version 2 (ongoing)</subsection>
+ <subsection name="v2"><img logo="ld2"/>λδ version 2 (active)</subsection>
<body>
The formal specification of λδ version 2
is available in the following formats:
<topitem name="source2">
<body>
- <rlink to="download/lambdadelta_2.tar.gz">lambdadelta_2 for Matita 0.99.2</rlink>
- (revised <date date="2014-10"/>).
- Source scripts.
+ <rlink to="download/lambdadelta_2A1.tar.gz">lambdadelta_2A1 for Matita 0.99.2</rlink>
+ (revised <notice class="gamma" text="2014-10"/>).
+ Source scripts [Svn revision: 12964].
+ <rlink to="html/documentation.html#ldR2c">Documentation (R2c)</rlink>.
</body>
<body>
The scripts are grouped in directories, first by part, then by component.
</body>
<body>
- <date date="Notice:"/>
+ <notice class="alpha" text="Notice:"/>
the scripts are checked by the latest version of Matita from
<link to="http://matita.cs.unibo.it/download.shtml">HELM Subversion repository</link>
at path <trunk/matita/>.
<body>
Informational pages on the parts of the specification:
- <rlink to="ground_2.html">Background</rlink>,
- <rlink to="basic_2.html">Core</rlink>,
- <rlink to="apps_2.html">Applications</rlink>.
- </body>
- <body>
- <date date="Notice on numerical acounts:"/>
- nodes are counted according to the "intrinsic complexity measure"
- [F. Guidi: "Procedural Representation of CIC Proof Terms"
- Journal of Automated Reasoning 44(1-2), Springer (February 2010), pp. 53-78].
+ <rlink to="html/ground_2.html">Background</rlink>,
+ <rlink to="html/static_2.html">Syntax</rlink>,
+ <rlink to="html/basic_2.html">Core</rlink>,
+ <rlink to="html/apps_2.html">Applications</rlink>.
</body>
<!-- VERSION 1 =========================================================== -->
- <subsection name="v1"><version1-icon/>λδ version 1 (dismissed)</subsection>
+ <subsection name="v1"><img logo="ld1"/>λδ version 1 (superseded)</subsection>
<body>
The formal specification of λδ version 1
is available in the following formats:
<topitem name="source1">
<body>
<rlink to="download/lambdadelta_1.tar.gz">lambdadelta_1 for Coq 7.3.1</rlink>
- (revised <date date="2012-10"/>).
+ (revised <notice class="delta" text="2015-09"/>).
Source scripts.
+ <rlink to="html/documentation.html#ldJ1a">Documentation (J1a)</rlink>.
+ <list><item>
+ <notice class="delta" text="2015 January 15."/>
+ 17 new lemmas and former lemma "eq_nat_dec" renamed as "nat_dec_neg".
+ </item></list>
</body>
<body>
The scripts are grouped in directories, one for each part.
<topitem name="static1">
<rlink to="static/matita/lambdadelta/">lambdadelta_1 for Matita 0.5</rlink>
- (revised <date date="2011-09"/>).
+ (revised <notice class="delta" text="2011-09"/>).
Static HTML pages generated by the <link to="http://helm.cs.unibo.it/">HELM</link> rendering engine.
<list><item>
<rlink to="static/matita/lambdadelta/basic_1/pr3/pr3/pr3_confluence.con.html">
<topitem name="dynamic1">
<link to="http://mowgli.cs.unibo.it:58080/apply?keys=RT&xmluri=http://helm.cs.unibo.it/helm//html/folder/index.html&prop.media-type=text/html&param.thmedia-type=text/html&param.thkeys=T1%2CT2%2CL%2CE&param.embedkeys=d_c%2CTC1%2CHC2%2CL&param.thencoding=UTF-8&prop.encoding=UTF-8&prop.doctype-public=-//W3C//DTD%20XHTML%201.0%20Transitional//EN&param.doctype-public=-//W3C//DTD%20XHTML%201.0%20Transitional//EN&param.encoding=UTF-8&param.media-type=text/html&param.keys=d_c%2CC1%2CHC2%2CL&profile=default&param.profile=default&param.CICURI=theory:/matita/lambdadelta/">
lambdadelta_1 for Matita 0.5</link>
- (revised <date date="2011-09"/>).
+ (revised <notice class="delta" text="2011-09"/>).
<link to="http://helm.cs.unibo.it/">HELM</link> directory.
- <date date="Notice: the HELM rendering engine is offline."/>
+ <notice class="alpha" text="Notice: the HELM rendering engine is offline."/>
</topitem>
+ <body>
+ Informational pages on the parts of the specification:
+ <rlink to="html/ground_1.html">Background</rlink>,
+ <rlink to="html/basic_1.html">Core</rlink>.
+ </body>
+
<footer/>
</page>
projects / helm.git / blobdiff