matita/matita/contribs/lambdadelta/basic_2/web/basic_2.ldw.xml

   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       logo = "crux"
   7       head = "cic:/matita/lambdadelta/basic_2/ (core λδ version 2)"
   8 >
   9    <sitemap name="sitemap"/>
  10 <!--
  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.
  14    </body>
  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.
  20    </body>
  21 -->
  22
  23    <section4 name="summary">Summary of the Specification</section4>
  24    <body>Here is a numerical account of the specification's contents
  25          and its timeline.
  26    </body>
  27    <table name="basic_2_sum"/>
  28
  29    <news class="gamma" date="2020-12-08.">
  30          λδ-2B is repackaged for publication.
  31    </news>
  32    <news class="gamma" date="2020-09-25.">
  33          Improved theory of rst-transition.
  34    </news>
  35    <news class="gamma" date="2020-04-16.">
  36          Sort hierarchy parameter removed from unbound rt-transition
  37          (anniversary milestone).
  38    </news>
  39    <news class="gamma" date="2020-02-27.">
  40          λδ-2B is repackaged without λδ-ground_2.
  41    </news>
  42    <news class="gamma" date="2019-11-19.">
  43          λδ-2B is released.
  44    </news>
  45    <news class="beta" date="2019-09-03.">
  46          Applicability condition is now parametrized
  47          with a generic subset of numbers.
  48    </news>
  49    <news class="beta" date="2019-06-02.">
  50          Applicability condition parametrized
  51          with an initial interval of numbers
  52          allows λδ-2B to generalize both λδ-2A and λδ-1B.
  53    </news>
  54    <news class="beta" date="2019-04-16.">
  55          Extended (λδ-2A) and restricted (λδ-1B) validity is decidable
  56          (anniversary milestone).
  57    </news>
  58    <news class="beta" date="2019-03-25.">
  59          Preservation of validity for rt-computation
  60          does not need the sort degree parameter
  61          (i.e. no induction on the degree).
  62    </news>
  63    <news class="beta" date="2018-11-01.">
  64          Extended (λδ-2A) and restricted (λδ-1B) validity rules justified.
  65    </news>
  66    <news class="alpha" date="2018-09-21.">
  67          λδ-2A completed with
  68          confluence of rt-computation and
  69          preservation of validity for rt-computation.
  70    </news>
  71    <news class="alpha" date="2018-06-08.">
  72          Behavioral component rt_computation completed.
  73    </news>
  74    <news class="alpha" date="2018-04-16.">
  75          "Big tree" theorem
  76          (anniversary milestone).
  77    </news>
  78    <news class="alpha" date="2018-03-09.">
  79          Support for rt-computation completed.
  80    </news>
  81    <news class="alpha" date="2017-10-17.">
  82          Exclusion binder in local environments.
  83          Syntactic component updated:
  84          syntax, relocation, s_transition, s_computation, static, i_static.
  85    </news>
  86    <news class="alpha" date="2017-04-16.">
  87          Strong rt-normalization
  88          for simply typed terms
  89          (anniversary milestone).
  90    </news>
  91    <news class="alpha" date="2017-03-16.">
  92          Behavioral component rt_transition completed.
  93    </news>
  94    <news class="alpha" date="2017-02-19.">
  95          Generic candidates of reducibility.
  96    </news>
  97    <news class="alpha" date="2017-01-17.">
  98          Confluence for parallel r-transition on referred entries of local environments.
  99    </news>
 100    <news class="alpha" date="2016-09-15.">
 101          Confluence for context-sensitive parallel r-transition on terms.
 102    </news>
 103    <news class="alpha" date="2016-04-16.">
 104          Syntactic component completed:
 105          syntax, relocation, s_transition, s_computation, static
 106          (anniversary milestone).
 107    </news>
 108    <news class="alpha" date="2016-03-25.">
 109          Relocation with reference transforming maps (rtmap).
 110    </news>
 111    <news class="alpha" date="2015-10-09.">
 112          λδ-2B is started.
 113    </news>
 114
 115    <section4 name="structure">Logical Structure of the Specification</section4>
 116    <body>This table reports the specification's components and their planes.
 117    </body>
 118    <table name="basic_2_src"/>
 119
 120    <footer/>
 121 </page>