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    <subsection name="B">Stage "B"</subsection>
  30 <!--
  31    <news class="alpha" date="Ongoing.">
  32          Context-sensitive subject equivalence
  33          for native type assignment.
  34    </news>
  35 -->
  36    <news class="alpha" date="2018 November 1.">
  37          Extended (λδ-2) and restricted (λδ-1) type rules justified.
  38    </news>
  39    <news class="alpha" date="2018 September 21.">
  40          λδ-2A completed with
  41          confluence of rt-computation and
  42          preservation of validity for rt-computation.
  43    </news>
  44    <news class="alpha" date="2018 June 8.">
  45          Behavioral component rt_computation completed.
  46    </news>
  47    <news class="alpha" date="2018 April 16.">
  48          "Big tree" theorem
  49          (anniversary milestone).
  50    </news>
  51    <news class="alpha" date="2018 March 9.">
  52          Support for rt-computation completed.
  53    </news>
  54    <news class="alpha" date="2017 October 17.">
  55          Exclusion binder in local environments.
  56          Syntactic component updated:
  57          syntax, relocation, s_transition, s_computation, static, i_static.
  58    </news>
  59    <news class="alpha" date="2017 April 16.">
  60          Strong rt-normalization
  61          for simply typed terms
  62          (anniversary milestone).
  63    </news>
  64    <news class="alpha" date="2017 March 16.">
  65          Behavioral component rt_transition completed.
  66    </news>
  67    <news class="alpha" date="2017 February 19.">
  68          Generic candidates of reducibility.
  69    </news>
  70    <news class="alpha" date="2017 January 17.">
  71          Confluence for parallel r-transition on referred entries of local environments.
  72    </news>
  73    <news class="alpha" date="2016 September 15.">
  74          Confluence for context-sensitive parallel r-transition on terms.
  75    </news>
  76    <news class="alpha" date="2016 April 16.">
  77          Syntactic component completed:
  78          syntax, relocation, s_transition, s_computation, static
  79          (anniversary milestone).
  80    </news>
  81    <news class="alpha" date="2016 March 25.">
  82          Relocation with reference transforming maps (rtmap).
  83    </news>
  84    <news class="alpha" date="2015 October 9.">
  85          λδ-2B is started.
  86    </news>
  87
  88    <subsection name="A">Stage "A" </subsection>
  89    <news class="delta" date="2015 August 27.">
  90          λδ-2A appears too complex and is dismissed.
  91    </news>
  92    <news class="gamma" date="2014 October 28.">
  93          λδ version 2A is released.
  94    </news>
  95    <news class="beta" date="2014 September 9.">
  96          Iterated static type assignment defined (more elegantly)
  97          as a primitive notion.
  98    </news>
  99    <news class="beta" date="2014 June 18.">
 100          Preservation of stratified native validity
 101          for context-sensitive computation on terms.
 102    </news>
 103    <news class="alpha" date="2014 June 9.">
 104          Strong qrst-normalization
 105          for simply typed terms.
 106    </news>
 107    <news class="alpha" date="2014 April 16.">
 108          Lazy equivalence on local environments
 109          added as q-step to rst-computation on closures
 110          (anniversary milestone).
 111    </news>
 112    <news class="alpha" date="2014 January 20.">
 113          Parametrized slicing on local environments
 114          comprises both versions of this operation
 115          (one from basic_1, the other used in basic_2 till now).
 116    </news>
 117    <news class="alpha" date="2013 August 7.">
 118          Passive support for global environments.
 119    </news>
 120    <news class="alpha" date="2013 July 27.">
 121          Reaxiomatized β-reductum as in rt-reduction.
 122    </news>
 123    <news class="alpha" date="2013 July 20.">
 124          Context-sensitive strong rt-normalization
 125          for simply typed terms.
 126    </news>
 127    <news class="alpha" date="2013 April 16.">
 128          Reaxiomatized substitution and reduction
 129          commute with respect to subclosure
 130          (anniversary milestone).
 131    </news>
 132    <news class="alpha" date="2013 March 16.">
 133          Mutual recursive preservation of stratified native validity
 134          for rst-computation on closures.
 135    </news>
 136    <news class="alpha" date="2012 October 16.">
 137          Confluence for context-free parallel reduction on closures.
 138    </news>
 139    <news class="alpha" date="2012 July 26.">
 140          Term binders polarized to control ζ-reduction (not released).
 141    </news>
 142    <news class="alpha" date="2012 April 16.">
 143          Context-sensitive subject equivalence
 144          for atomic arity assignment
 145          (anniversary milestone).
 146    </news>
 147    <news class="alpha" date="2012 March 15.">
 148          Context-sensitive strong normalization
 149          for simply typed terms.
 150    </news>
 151    <news class="alpha" date="2012 January 27.">
 152          Generic candidates of reducibility.
 153    </news>
 154    <news class="alpha" date="2011 September 21.">
 155          Confluence for context-sensitive parallel reduction on terms.
 156    </news>
 157    <news class="alpha" date="2011 September 6.">
 158          Confluence for context-free parallel reduction on terms.
 159    </news>
 160    <news class="alpha" date="2011 April 17.">
 161          λδ-2A is started.
 162    </news>
 163
 164    <section4 name="structure">Logical Structure of the Specification</section4>
 165    <body>This table reports the specification's components and their planes.
 166    </body>
 167    <table name="basic_2_src"/>
 168
 169    <footer/>
 170 </page>