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>
31 <news class="alpha" date="Ongoing.">
32 Context-sensitive subject equivalence
33 for native type assignment.
36 <news class="alpha" date="2018 September 21.">
38 confluence of rt-computation and
39 preservation of validity for rt-computation.
41 <news class="alpha" date="2018 June 8.">
42 Behavioral component rt_computation completed.
44 <news class="alpha" date="2018 April 16.">
46 (anniversary milestone).
48 <news class="alpha" date="2018 March 9.">
49 Support for rt-computation completed.
51 <news class="alpha" date="2017 October 17.">
52 Exclusion binder in local environments.
53 Syntactic component updated:
54 syntax, relocation, s_transition, s_computation, static, i_static.
56 <news class="alpha" date="2017 April 16.">
57 Strong rt-normalization
58 for simply typed terms
59 (anniversary milestone).
61 <news class="alpha" date="2017 March 16.">
62 Behavioral component rt_transition completed.
64 <news class="alpha" date="2017 February 19.">
65 Generic candidates of reducibility.
67 <news class="alpha" date="2017 January 17.">
68 Confluence for parallel r-transition on referred entries of local environments.
70 <news class="alpha" date="2016 September 15.">
71 Confluence for context-sensitive parallel r-transition on terms.
73 <news class="alpha" date="2016 April 16.">
74 Syntactic component completed:
75 syntax, relocation, s_transition, s_computation, static
76 (anniversary milestone).
78 <news class="alpha" date="2016 March 25.">
79 Relocation with reference transforming maps (rtmap).
81 <news class="alpha" date="2015 October 9.">
85 <subsection name="A">Stage "A" </subsection>
86 <news class="delta" date="2015 August 27.">
87 λδ-2A appears too complex and is dismissed.
89 <news class="gamma" date="2014 October 28.">
90 λδ version 2A is released.
92 <news class="beta" date="2014 September 9.">
93 Iterated static type assignment defined (more elegantly)
94 as a primitive notion.
96 <news class="beta" date="2014 June 18.">
97 Preservation of stratified native validity
98 for context-sensitive computation on terms.
100 <news class="alpha" date="2014 June 9.">
101 Strong qrst-normalization
102 for simply typed terms.
104 <news class="alpha" date="2014 April 16.">
105 Lazy equivalence on local environments
106 added as q-step to rst-computation on closures
107 (anniversary milestone).
109 <news class="alpha" date="2014 January 20.">
110 Parametrized slicing on local environments
111 comprises both versions of this operation
112 (one from basic_1, the other used in basic_2 till now).
114 <news class="alpha" date="2013 August 7.">
115 Passive support for global environments.
117 <news class="alpha" date="2013 July 27.">
118 Reaxiomatized β-reductum as in rt-reduction.
120 <news class="alpha" date="2013 July 20.">
121 Context-sensitive strong rt-normalization
122 for simply typed terms.
124 <news class="alpha" date="2013 April 16.">
125 Reaxiomatized substitution and reduction
126 commute with respect to subclosure
127 (anniversary milestone).
129 <news class="alpha" date="2013 March 16.">
130 Mutual recursive preservation of stratified native validity
131 for rst-computation on closures.
133 <news class="alpha" date="2012 October 16.">
134 Confluence for context-free parallel reduction on closures.
136 <news class="alpha" date="2012 July 26.">
137 Term binders polarized to control ζ-reduction (not released).
139 <news class="alpha" date="2012 April 16.">
140 Context-sensitive subject equivalence
141 for atomic arity assignment
142 (anniversary milestone).
144 <news class="alpha" date="2012 March 15.">
145 Context-sensitive strong normalization
146 for simply typed terms.
148 <news class="alpha" date="2012 January 27.">
149 Generic candidates of reducibility.
151 <news class="alpha" date="2011 September 21.">
152 Confluence for context-sensitive parallel reduction on terms.
154 <news class="alpha" date="2011 September 6.">
155 Confluence for context-free parallel reduction on terms.
157 <news class="alpha" date="2011 April 17.">
161 <section4 name="structure">Logical Structure of the Specification</section4>
162 <body>This table reports the specification's components and their planes.
164 <table name="basic_2_src"/>