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 = "cic:/matita/lambdadelta/basic_2/ (core λδ version 2)"
8 <sitemap name="sitemap"/>
10 <section>System's Syntax and Behavior</section>
11 <body>This is a summary of the "block structure"
12 of the System's syntactic items and reductions.
14 <table name="basic_2_blk"/>
15 <body>* In terms only.
16 ** In terms and local environments only.
17 *** In global environments only.
18 **** Sort level k in terms only.
22 <section4 name="summary">Summary of the Specification</section4>
23 <body>Here is a numerical acount of the specification's contents
26 <table name="basic_2_sum"/>
28 <subsection name="B">Stage "B"</subsection>
29 <news class="alpha" date="Ongoing.">
30 Context-sensitive subject equivalence
31 for native type assignment.
34 <subsection name="A">Stage "A": "Extending the Applicability Condition"</subsection>
35 <news class="gamma" date="2014 October 28.">
36 λδ version 2A is released.
38 <news class="beta" date="2014 September 9.">
39 Iterated static type assignment defined (more elegantly)
40 as a primitive notion.
42 <news class="beta" date="2014 June 18.">
43 Preservation of stratified native validity
44 for context-sensitive computation on terms.
46 <news class="alpha" date="2014 June 9.">
47 Strong qrst-normalization
48 for simply typed terms.
50 <news class="alpha" date="2014 April 16.">
51 Lazy equivalence on local environments
52 addded as q-step to rst-computation on closures
53 (anniversary milestone).
55 <news class="alpha" date="2014 January 20.">
56 Parametrized slicing of local environments
57 comprises both versions of this operation
58 (one from basic_1, the other used in basic_2 till now).
60 <news class="alpha" date="2013 August 7.">
61 Passive support for global environments.
63 <news class="alpha" date="2013 July 27.">
64 Reaxiomatized β-reductum as in rt-reduction.
66 <news class="alpha" date="2013 July 20.">
67 Context-sensitive strong rt-normalization
68 for simply typed terms.
70 <news class="alpha" date="2013 April 16.">
71 Reaxiomatized substitution and reduction
72 commute with respect to subclosure
73 (anniversary milestone).
75 <news class="alpha" date="2013 March 16.">
76 Mutual recursive preservation of stratified native validity
77 for rst-computation on closures.
79 <news class="alpha" date="2012 October 16.">
80 Confluence for context-free parallel reduction on closures.
82 <news class="alpha" date="2012 July 26.">
83 Term binders polarized to control ζ-reduction (not released).
85 <news class="alpha" date="2012 April 16.">
86 Context-sensitive subject equivalence
87 for atomic arity assignment
88 (anniversary milestone).
90 <news class="alpha" date="2012 March 15.">
91 Context-sensitive strong normalization
92 for simply typed terms.
94 <news class="alpha" date="2012 January 27.">
95 Support for abstract candidates of reducibility.
97 <news class="alpha" date="2011 September 21.">
98 Confluence for context-sensitive parallel reduction on terms.
100 <news class="alpha" date="2011 September 6.">
101 Confluence for context-free parallel reduction on terms.
103 <news class="alpha" date="2011 April 17.">
104 Specification starts.
107 <section4 name="structure">Logical Structure of the Specification</section4>
108 <body>This table reports the specification's components and their planes.
110 <table name="basic_2_src"/>