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="2018 June 8.">
38 Behavioral component rt_computation completed.
40 <news class="alpha" date="2018 April 16.">
42 (anniversary milestone).
44 <news class="alpha" date="2018 March 9.">
45 Support for rt-computation completed.
47 <news class="alpha" date="2017 October 17.">
48 Exclusion binder in local environments.
49 Syntactic component updated:
50 syntax, relocation, s_transition, s_computation, static, i_static.
52 <news class="alpha" date="2017 April 16.">
53 Strong rt-normalization
54 for simply typed terms
55 (anniversary milestone).
57 <news class="alpha" date="2017 March 16.">
58 Behavioral component rt_transition completed.
60 <news class="alpha" date="2017 February 19.">
61 Generic candidates of reducibility.
63 <news class="alpha" date="2017 January 17.">
64 Confluence for parallel r-transition on referred entries of local environments.
66 <news class="alpha" date="2016 September 15.">
67 Confluence for context-sensitive parallel r-transition on terms.
69 <news class="alpha" date="2016 April 16.">
70 Syntactic component completed:
71 syntax, relocation, s_transition, s_computation, static
72 (anniversary milestone).
74 <news class="alpha" date="2016 March 25.">
75 Relocation with reference transforming maps (rtmap).
77 <news class="alpha" date="2015 October 9.">
78 λδ version 2A2 is started.
81 <subsection name="A1">Stage "A1": "Extending the Applicability Condition"</subsection>
82 <news class="delta" date="2015 August 27.">
83 λδ version 2A1 appears too complex and is dismissed.
85 <news class="gamma" date="2014 October 28.">
86 λδ version 2A1 is released.
88 <news class="beta" date="2014 September 9.">
89 Iterated static type assignment defined (more elegantly)
90 as a primitive notion.
92 <news class="beta" date="2014 June 18.">
93 Preservation of stratified native validity
94 for context-sensitive computation on terms.
96 <news class="alpha" date="2014 June 9.">
97 Strong qrst-normalization
98 for simply typed terms.
100 <news class="alpha" date="2014 April 16.">
101 Lazy equivalence on local environments
102 added as q-step to rst-computation on closures
103 (anniversary milestone).
105 <news class="alpha" date="2014 January 20.">
106 Parametrized slicing on local environments
107 comprises both versions of this operation
108 (one from basic_1, the other used in basic_2 till now).
110 <news class="alpha" date="2013 August 7.">
111 Passive support for global environments.
113 <news class="alpha" date="2013 July 27.">
114 Reaxiomatized β-reductum as in rt-reduction.
116 <news class="alpha" date="2013 July 20.">
117 Context-sensitive strong rt-normalization
118 for simply typed terms.
120 <news class="alpha" date="2013 April 16.">
121 Reaxiomatized substitution and reduction
122 commute with respect to subclosure
123 (anniversary milestone).
125 <news class="alpha" date="2013 March 16.">
126 Mutual recursive preservation of stratified native validity
127 for rst-computation on closures.
129 <news class="alpha" date="2012 October 16.">
130 Confluence for context-free parallel reduction on closures.
132 <news class="alpha" date="2012 July 26.">
133 Term binders polarized to control ζ-reduction (not released).
135 <news class="alpha" date="2012 April 16.">
136 Context-sensitive subject equivalence
137 for atomic arity assignment
138 (anniversary milestone).
140 <news class="alpha" date="2012 March 15.">
141 Context-sensitive strong normalization
142 for simply typed terms.
144 <news class="alpha" date="2012 January 27.">
145 Generic candidates of reducibility.
147 <news class="alpha" date="2011 September 21.">
148 Confluence for context-sensitive parallel reduction on terms.
150 <news class="alpha" date="2011 September 6.">
151 Confluence for context-free parallel reduction on terms.
153 <news class="alpha" date="2011 April 17.">
154 λδ version 2 is started.
157 <section4 name="structure">Logical Structure of the Specification</section4>
158 <body>This table reports the specification's components and their planes.
160 <table name="basic_2_src"/>