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1 <?xml version="1.0" encoding="UTF-8"?>
2
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)"
7 >
8    <sitemap name="sitemap"/>
9 <!--   
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.
13    </body>
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.
19    </body>
20 -->
21
22    <section4 name="summary">Summary of the Specification</section4>
23    <body>Here is a numerical account of the specification's contents
24          and its timeline.
25    </body>
26    <table name="basic_2_sum"/>
27
28    <subsection name="B">Stage "B"</subsection>
29    <news class="alpha" date="Ongoing.">
30          Context-sensitive subject equivalence
31          for native type assignment.
32    </news>
33
34    <subsection name="A">Stage "A": "Extending the Applicability Condition"</subsection>
35    <news class="alpha" date="2015 October 9.">
36          λδ version 2A2 is started.
37    </news>
38    <news class="delta" date="2015 August 27.">
39          λδ version 2A1 appears too complex and is dismissed.
40    </news>
41    <news class="gamma" date="2014 October 28.">
42          λδ version 2A1 is released.
43    </news>
44    <news class="beta" date="2014 September 9.">
45          Iterated static type assignment defined (more elegantly)
46          as a primitive notion.
47    </news>
48    <news class="beta" date="2014 June 18.">
49          Preservation of stratified native validity
50          for context-sensitive computation on terms.
51    </news>
52    <news class="alpha" date="2014 June 9.">
53          Strong qrst-normalization
54          for simply typed terms.
55    </news>
56    <news class="alpha" date="2014 April 16.">
57          Lazy equivalence on local environments
58          added as q-step to rst-computation on closures
59          (anniversary milestone).
60    </news>
61    <news class="alpha" date="2014 January 20.">
62          Parametrized slicing of local environments
63          comprises both versions of this operation
64          (one from basic_1, the other used in basic_2 till now).
65    </news>
66    <news class="alpha" date="2013 August 7.">
67          Passive support for global environments.
68    </news>
69    <news class="alpha" date="2013 July 27.">
70          Reaxiomatized β-reductum as in rt-reduction.
71    </news>
72    <news class="alpha" date="2013 July 20.">
73          Context-sensitive strong rt-normalization
74          for simply typed terms.
75    </news>
76    <news class="alpha" date="2013 April 16.">
77          Reaxiomatized substitution and reduction
78          commute with respect to subclosure
79          (anniversary milestone).
80    </news>
81    <news class="alpha" date="2013 March 16.">
82          Mutual recursive preservation of stratified native validity
83          for rst-computation on closures.
84    </news>
85    <news class="alpha" date="2012 October 16.">
86          Confluence for context-free parallel reduction on closures.
87    </news>
88    <news class="alpha" date="2012 July 26.">
89          Term binders polarized to control ζ-reduction (not released).
90    </news>
91    <news class="alpha" date="2012 April 16.">
92          Context-sensitive subject equivalence
93          for atomic arity assignment
94          (anniversary milestone).
95    </news>
96    <news class="alpha" date="2012 March 15.">
97          Context-sensitive strong normalization
98          for simply typed terms.
99    </news>
100    <news class="alpha" date="2012 January 27.">
101          Support for abstract candidates of reducibility.
102    </news>
103    <news class="alpha" date="2011 September 21.">
104          Confluence for context-sensitive parallel reduction on terms.
105    </news>
106    <news class="alpha" date="2011 September 6.">
107          Confluence for context-free parallel reduction on terms.
108    </news>
109    <news class="alpha" date="2011 April 17.">
110          λδ version 2 is started.
111    </news>
112
113    <section4 name="structure">Logical Structure of the Specification</section4>
114    <body>This table reports the specification's components and their planes.
115    </body>
116    <table name="basic_2_src"/>
117
118    <footer/>
119 </page>