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 account 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="A2">Stage "A2": "Extending the Applicability Condition"</subsection>
35 <news class="alpha" date="2015 October 9.">
36 λδ version 2A2 is started.
39 <subsection name="A1">Stage "A1": "Extending the Applicability Condition"</subsection>
40 <news class="delta" date="2015 August 27.">
41 λδ version 2A1 appears too complex and is dismissed.
43 <news class="gamma" date="2014 October 28.">
44 λδ version 2A1 is released.
46 <news class="beta" date="2014 September 9.">
47 Iterated static type assignment defined (more elegantly)
48 as a primitive notion.
50 <news class="beta" date="2014 June 18.">
51 Preservation of stratified native validity
52 for context-sensitive computation on terms.
54 <news class="alpha" date="2014 June 9.">
55 Strong qrst-normalization
56 for simply typed terms.
58 <news class="alpha" date="2014 April 16.">
59 Lazy equivalence on local environments
60 added as q-step to rst-computation on closures
61 (anniversary milestone).
63 <news class="alpha" date="2014 January 20.">
64 Parametrized slicing of local environments
65 comprises both versions of this operation
66 (one from basic_1, the other used in basic_2 till now).
68 <news class="alpha" date="2013 August 7.">
69 Passive support for global environments.
71 <news class="alpha" date="2013 July 27.">
72 Reaxiomatized β-reductum as in rt-reduction.
74 <news class="alpha" date="2013 July 20.">
75 Context-sensitive strong rt-normalization
76 for simply typed terms.
78 <news class="alpha" date="2013 April 16.">
79 Reaxiomatized substitution and reduction
80 commute with respect to subclosure
81 (anniversary milestone).
83 <news class="alpha" date="2013 March 16.">
84 Mutual recursive preservation of stratified native validity
85 for rst-computation on closures.
87 <news class="alpha" date="2012 October 16.">
88 Confluence for context-free parallel reduction on closures.
90 <news class="alpha" date="2012 July 26.">
91 Term binders polarized to control ζ-reduction (not released).
93 <news class="alpha" date="2012 April 16.">
94 Context-sensitive subject equivalence
95 for atomic arity assignment
96 (anniversary milestone).
98 <news class="alpha" date="2012 March 15.">
99 Context-sensitive strong normalization
100 for simply typed terms.
102 <news class="alpha" date="2012 January 27.">
103 Support for abstract candidates of reducibility.
105 <news class="alpha" date="2011 September 21.">
106 Confluence for context-sensitive parallel reduction on terms.
108 <news class="alpha" date="2011 September 6.">
109 Confluence for context-free parallel reduction on terms.
111 <news class="alpha" date="2011 April 17.">
112 λδ version 2 is started.
115 <section4 name="structure">Logical Structure of the Specification</section4>
116 <body>This table reports the specification's components and their planes.
118 <table name="basic_2_src"/>