<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:
+ which includes the major milestones.
+ </body>
+ <body>
+ The life cycle of a specification consists of four periods.
+ <notice class="alpha" notice="Alpha:"/>
+ the definitions are designed and the major propositions are proved,
+ then the calculus is announced with a presentation.
+ <notice class="beta" notice="Beta:"/>
+ major changes and additions may occur before the calculus is released on paper.
+ <notice class="gamma" notice="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+ subsequent improvements occur until the specification is completed or superseded,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" notice="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>
+ <notice class="alpha" notice="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>
+ <notice class="alpha" notice="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 2 =========================================================== -->
- <subsection name="v2"><version2-icon/>λδ version 2 (ongoing)</subsection>
+ <subsection name="v2"><version2-icon/>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"/>).
+ (revised <notice class="gamma" notice="2014-10"/>).
Source scripts.
</body>
<body>
The scripts are grouped in directories, first by part, then by component.
</body>
<body>
- <date date="Notice:"/>
+ <notice class="alpha" notice="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/>.
<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].
- </body>
<!-- VERSION 1 =========================================================== -->
- <subsection name="v1"><version1-icon/>λδ version 1 (dismissed)</subsection>
+ <subsection name="v1"><version1-icon/>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" notice="2015-01"/>).
Source scripts.
+ <list><item>
+ <notice class="delta" notice="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" notice="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" notice="2011-09"/>).
<link to="http://helm.cs.unibo.it/">HELM</link> directory.
- <date date="Notice: the HELM rendering engine is offline."/>
+ <notice class="alpha" notice="Notice: the HELM rendering engine is offline."/>
</topitem>
+ <body>
+ Informational pages on the parts of the specification:
+ <rlink to="ground_1.html">Background</rlink>,
+ <rlink to="basic_1.html">Core</rlink>.
+ </body>
+
<footer/>
</page>
projects / helm.git / blobdiff