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 April 16.">
39 (anniversary milestone).
41 <news class="alpha" date="2018 March 9.">
42 Support for rt-computation completed.
44 <news class="alpha" date="2017 October 17.">
45 Exclusion binder in local environments.
46 Syntactic component updated:
47 syntax, relocation, s_transition, s_computation, static, i_static.
49 <news class="alpha" date="2017 April 16.">
50 Strong rt-normalization
51 for simply typed terms
52 (anniversary milestone).
54 <news class="alpha" date="2017 March 16.">
55 First behavioral component completed:
58 <news class="alpha" date="2017 February 19.">
59 Generic candidates of reducibility.
61 <news class="alpha" date="2017 January 17.">
62 Confluence for parallel r-transition on referred entries of local environments.
64 <news class="alpha" date="2016 September 15.">
65 Confluence for context-sensitive parallel r-transition on terms.
67 <news class="alpha" date="2016 April 16.">
68 Syntactic component completed:
69 syntax, relocation, s_transition, s_computation, static
70 (anniversary milestone).
72 <news class="alpha" date="2016 March 25.">
73 Relocation with reference transforming maps (rtmap).
75 <news class="alpha" date="2015 October 9.">
76 λδ version 2A2 is started.
79 <subsection name="A1">Stage "A1": "Extending the Applicability Condition"</subsection>
80 <news class="delta" date="2015 August 27.">
81 λδ version 2A1 appears too complex and is dismissed.
83 <news class="gamma" date="2014 October 28.">
84 λδ version 2A1 is released.
86 <news class="beta" date="2014 September 9.">
87 Iterated static type assignment defined (more elegantly)
88 as a primitive notion.
90 <news class="beta" date="2014 June 18.">
91 Preservation of stratified native validity
92 for context-sensitive computation on terms.
94 <news class="alpha" date="2014 June 9.">
95 Strong qrst-normalization
96 for simply typed terms.
98 <news class="alpha" date="2014 April 16.">
99 Lazy equivalence on local environments
100 added as q-step to rst-computation on closures
101 (anniversary milestone).
103 <news class="alpha" date="2014 January 20.">
104 Parametrized slicing on local environments
105 comprises both versions of this operation
106 (one from basic_1, the other used in basic_2 till now).
108 <news class="alpha" date="2013 August 7.">
109 Passive support for global environments.
111 <news class="alpha" date="2013 July 27.">
112 Reaxiomatized β-reductum as in rt-reduction.
114 <news class="alpha" date="2013 July 20.">
115 Context-sensitive strong rt-normalization
116 for simply typed terms.
118 <news class="alpha" date="2013 April 16.">
119 Reaxiomatized substitution and reduction
120 commute with respect to subclosure
121 (anniversary milestone).
123 <news class="alpha" date="2013 March 16.">
124 Mutual recursive preservation of stratified native validity
125 for rst-computation on closures.
127 <news class="alpha" date="2012 October 16.">
128 Confluence for context-free parallel reduction on closures.
130 <news class="alpha" date="2012 July 26.">
131 Term binders polarized to control ζ-reduction (not released).
133 <news class="alpha" date="2012 April 16.">
134 Context-sensitive subject equivalence
135 for atomic arity assignment
136 (anniversary milestone).
138 <news class="alpha" date="2012 March 15.">
139 Context-sensitive strong normalization
140 for simply typed terms.
142 <news class="alpha" date="2012 January 27.">
143 Generic candidates of reducibility.
145 <news class="alpha" date="2011 September 21.">
146 Confluence for context-sensitive parallel reduction on terms.
148 <news class="alpha" date="2011 September 6.">
149 Confluence for context-free parallel reduction on terms.
151 <news class="alpha" date="2011 April 17.">
152 λδ version 2 is started.
155 <section4 name="structure">Logical Structure of the Specification</section4>
156 <body>This table reports the specification's components and their planes.
158 <table name="basic_2_src"/>