<?xml version="1.0" encoding="UTF-8"?>
<page xmlns="http://lambdadelta.info/"
- description = "\lambda\delta version 2"
- title = "\lambda\delta version 2"
- head = "cic:/matita/lambdadelta/basic_2/ (λδ version 2)"
+ description = "\lambda\delta home page"
+ title = "\lambda\delta home page"
+ logo = "crux"
+ head = "cic:/matita/lambdadelta/basic_2/ (core λδ version 2)"
>
+ <sitemap name="sitemap"/>
<!--
<section>System's Syntax and Behavior</section>
<body>This is a summary of the "block structure"
</body>
-->
- <section>Summary of the Specification</section>
- <body>Here is a numerical acount of the specification's contents
+ <section4 name="summary">Summary of the Specification</section4>
+ <body>Here is a numerical account of the specification's contents
and its timeline.
- Nodes are counted according to the "intrinsinc complexity measure"
- [F. Guidi: "Procedural Representation of CIC Proof Terms"
- Journal of Automated Reasoning 44(1-2), Springer (February 2010),
- pp. 53-78].
</body>
<table name="basic_2_sum"/>
- <subsection>Stage "B"</subsection>
- <news date="In progress.">
- Context-sensitive subject equivalence
- for native type assignment.
+ <subsection name="B">Stage "B"</subsection>
+ <news class="beta" date="2019 March 25.">
+ Preservation of validity for rt-computation
+ does not need the sort degree parameter
+ (i.e. no induction on the degree).
+ </news>
+ <news class="beta" date="2018 November 1.">
+ Extended (λδ-2) and restricted (λδ-1) type rules justified.
+ </news>
+ <news class="alpha" date="2018 September 21.">
+ λδ-2A completed with
+ confluence of rt-computation and
+ preservation of validity for rt-computation.
+ </news>
+ <news class="alpha" date="2018 June 8.">
+ Behavioral component rt_computation completed.
+ </news>
+ <news class="alpha" date="2018 April 16.">
+ "Big tree" theorem
+ (anniversary milestone).
+ </news>
+ <news class="alpha" date="2018 March 9.">
+ Support for rt-computation completed.
+ </news>
+ <news class="alpha" date="2017 October 17.">
+ Exclusion binder in local environments.
+ Syntactic component updated:
+ syntax, relocation, s_transition, s_computation, static, i_static.
+ </news>
+ <news class="alpha" date="2017 April 16.">
+ Strong rt-normalization
+ for simply typed terms
+ (anniversary milestone).
+ </news>
+ <news class="alpha" date="2017 March 16.">
+ Behavioral component rt_transition completed.
+ </news>
+ <news class="alpha" date="2017 February 19.">
+ Generic candidates of reducibility.
+ </news>
+ <news class="alpha" date="2017 January 17.">
+ Confluence for parallel r-transition on referred entries of local environments.
+ </news>
+ <news class="alpha" date="2016 September 15.">
+ Confluence for context-sensitive parallel r-transition on terms.
+ </news>
+ <news class="alpha" date="2016 April 16.">
+ Syntactic component completed:
+ syntax, relocation, s_transition, s_computation, static
+ (anniversary milestone).
+ </news>
+ <news class="alpha" date="2016 March 25.">
+ Relocation with reference transforming maps (rtmap).
+ </news>
+ <news class="alpha" date="2015 October 9.">
+ λδ-2B is started.
</news>
- <subsection>Stage "A": "Weakening the Applicability Condition"</subsection>
- <news date="2014 September 9.">
+ <subsection name="A">Stage "A" </subsection>
+ <news class="delta" date="2015 August 27.">
+ λδ-2A appears too complex and is dismissed.
+ </news>
+ <news class="gamma" date="2014 October 28.">
+ λδ version 2A is released.
+ </news>
+ <news class="beta" date="2014 September 9.">
Iterated static type assignment defined (more elegantly)
as a primitive notion.
</news>
- <news date="2014 June 18.">
+ <news class="beta" date="2014 June 18.">
Preservation of stratified native validity
for context-sensitive computation on terms.
</news>
- <news date="2014 June 9.">
+ <news class="alpha" date="2014 June 9.">
Strong qrst-normalization
for simply typed terms.
</news>
- <news date="2014 April 16.">
+ <news class="alpha" date="2014 April 16.">
Lazy equivalence on local environments
- addded as q-step to rst-computation on closures
+ added as q-step to rst-computation on closures
(anniversary milestone).
</news>
- <news date="2014 January 20.">
- Parametrized slicing of local environments
+ <news class="alpha" date="2014 January 20.">
+ Parametrized slicing on local environments
comprises both versions of this operation
(one from basic_1, the other used in basic_2 till now).
</news>
- <news date="2013 August 7.">
+ <news class="alpha" date="2013 August 7.">
Passive support for global environments.
</news>
- <news date="2013 July 27.">
+ <news class="alpha" date="2013 July 27.">
Reaxiomatized β-reductum as in rt-reduction.
</news>
- <news date="2013 July 20.">
+ <news class="alpha" date="2013 July 20.">
Context-sensitive strong rt-normalization
for simply typed terms.
</news>
- <news date="2013 April 16.">
+ <news class="alpha" date="2013 April 16.">
Reaxiomatized substitution and reduction
commute with respect to subclosure
(anniversary milestone).
</news>
- <news date="2013 March 16.">
+ <news class="alpha" date="2013 March 16.">
Mutual recursive preservation of stratified native validity
for rst-computation on closures.
</news>
- <news date="2012 October 16.">
+ <news class="alpha" date="2012 October 16.">
Confluence for context-free parallel reduction on closures.
</news>
- <news date="2012 July 26.">
+ <news class="alpha" date="2012 July 26.">
Term binders polarized to control ζ-reduction (not released).
</news>
- <news date="2012 April 16.">
+ <news class="alpha" date="2012 April 16.">
Context-sensitive subject equivalence
for atomic arity assignment
(anniversary milestone).
</news>
- <news date="2012 March 15.">
+ <news class="alpha" date="2012 March 15.">
Context-sensitive strong normalization
for simply typed terms.
</news>
- <news date="2012 January 27.">
- Support for abstract candidates of reducibility.
+ <news class="alpha" date="2012 January 27.">
+ Generic candidates of reducibility.
</news>
- <news date="2011 September 21.">
+ <news class="alpha" date="2011 September 21.">
Confluence for context-sensitive parallel reduction on terms.
</news>
- <news date="2011 September 6.">
+ <news class="alpha" date="2011 September 6.">
Confluence for context-free parallel reduction on terms.
</news>
- <news date="2011 April 17.">
- Specification starts.
+ <news class="alpha" date="2011 April 17.">
+ λδ-2A is started.
</news>
- <section>Logical Structure of the Specification</section>
- <body>The source files are grouped in planes and components
- according to the following table.
- Notation files covering the whole specification are provided.
- The notation for the relations or functions introduced in each file
- is shown in parentheses (? are placeholders).
+ <section4 name="structure">Logical Structure of the Specification</section4>
+ <body>This table reports the specification's components and their planes.
</body>
<table name="basic_2_src"/>
- <section>Physical Structure of the Specification</section>
- <body>The source files are grouped in directories,
- one for each component.
- </body>
<footer/>
</page>
projects / helm.git / blobdiff