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"
7 head = "cic:/matita/lambdadelta/basic_2/ (core λδ version 2)"
9 <sitemap name="sitemap"/>
11 <section>System's Syntax and Behavior</section>
12 <body>This is a summary of the "block structure"
13 of the System's syntactic items and reductions.
15 <table name="basic_2_blk"/>
16 <body>* In terms only.
17 ** In terms and local environments only.
18 *** In global environments only.
19 **** Sort level k in terms only.
23 <section4 name="summary">Summary of the Specification</section4>
24 <body>Here is a numerical account of the specification's contents
27 <table name="basic_2_sum"/>
29 <subsection name="B">Stage "B"</subsection>
30 <news class="alpha" date="Ongoing.">
31 Context-sensitive subject equivalence
32 for native type assignment.
35 <subsection name="A2">Stage "A2": "Extending the Applicability Condition"</subsection>
37 <news class="alpha" date="2016 April 16.">
38 Grammatical component reconstructed:
39 grammar, relocation, s_transition, s_computation, static
40 (anniversary milestone).
43 <news class="alpha" date="2016 March 25.">
44 Relocation with reference transforming maps (rtmap).
47 <news class="alpha" date="2015 October 9.">
48 λδ version 2A2 is started.
51 <subsection name="A1">Stage "A1": "Extending the Applicability Condition"</subsection>
52 <news class="delta" date="2015 August 27.">
53 λδ version 2A1 appears too complex and is dismissed.
55 <news class="gamma" date="2014 October 28.">
56 λδ version 2A1 is released.
58 <news class="beta" date="2014 September 9.">
59 Iterated static type assignment defined (more elegantly)
60 as a primitive notion.
62 <news class="beta" date="2014 June 18.">
63 Preservation of stratified native validity
64 for context-sensitive computation on terms.
66 <news class="alpha" date="2014 June 9.">
67 Strong qrst-normalization
68 for simply typed terms.
70 <news class="alpha" date="2014 April 16.">
71 Lazy equivalence on local environments
72 added as q-step to rst-computation on closures
73 (anniversary milestone).
75 <news class="alpha" date="2014 January 20.">
76 Parametrized slicing of local environments
77 comprises both versions of this operation
78 (one from basic_1, the other used in basic_2 till now).
80 <news class="alpha" date="2013 August 7.">
81 Passive support for global environments.
83 <news class="alpha" date="2013 July 27.">
84 Reaxiomatized β-reductum as in rt-reduction.
86 <news class="alpha" date="2013 July 20.">
87 Context-sensitive strong rt-normalization
88 for simply typed terms.
90 <news class="alpha" date="2013 April 16.">
91 Reaxiomatized substitution and reduction
92 commute with respect to subclosure
93 (anniversary milestone).
95 <news class="alpha" date="2013 March 16.">
96 Mutual recursive preservation of stratified native validity
97 for rst-computation on closures.
99 <news class="alpha" date="2012 October 16.">
100 Confluence for context-free parallel reduction on closures.
102 <news class="alpha" date="2012 July 26.">
103 Term binders polarized to control ζ-reduction (not released).
105 <news class="alpha" date="2012 April 16.">
106 Context-sensitive subject equivalence
107 for atomic arity assignment
108 (anniversary milestone).
110 <news class="alpha" date="2012 March 15.">
111 Context-sensitive strong normalization
112 for simply typed terms.
114 <news class="alpha" date="2012 January 27.">
115 Support for abstract candidates of reducibility.
117 <news class="alpha" date="2011 September 21.">
118 Confluence for context-sensitive parallel reduction on terms.
120 <news class="alpha" date="2011 September 6.">
121 Confluence for context-free parallel reduction on terms.
123 <news class="alpha" date="2011 April 17.">
124 λδ version 2 is started.
127 <section4 name="structure">Logical Structure of the Specification</section4>
128 <body>This table reports the specification's components and their planes.
130 <table name="basic_2_src"/>