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    <news class="beta" date="2019 April 16.">
  31          Extended (λδ-2) and restricted (λδ-1) validity is decidable
  32          (anniversary milestone).
  33    </news>
  34    <news class="beta" date="2019 March 25.">
  35          Preservation of validity for rt-computation
  36          does not need the sort degree parameter
  37          (i.e. no induction on the degree).
  38    </news>
  39    <news class="beta" date="2018 November 1.">
  40          Extended (λδ-2) and restricted (λδ-1) type rules justified.
  41    </news>
  42    <news class="alpha" date="2018 September 21.">
  43          λδ-2A completed with
  44          confluence of rt-computation and
  45          preservation of validity for rt-computation.
  46    </news>
  47    <news class="alpha" date="2018 June 8.">
  48          Behavioral component rt_computation completed.
  49    </news>
  50    <news class="alpha" date="2018 April 16.">
  51          "Big tree" theorem
  52          (anniversary milestone).
  53    </news>
  54    <news class="alpha" date="2018 March 9.">
  55          Support for rt-computation completed.
  56    </news>
  57    <news class="alpha" date="2017 October 17.">
  58          Exclusion binder in local environments.
  59          Syntactic component updated:
  60          syntax, relocation, s_transition, s_computation, static, i_static.
  61    </news>
  62    <news class="alpha" date="2017 April 16.">
  63          Strong rt-normalization
  64          for simply typed terms
  65          (anniversary milestone).
  66    </news>
  67    <news class="alpha" date="2017 March 16.">
  68          Behavioral component rt_transition completed.
  69    </news>
  70    <news class="alpha" date="2017 February 19.">
  71          Generic candidates of reducibility.
  72    </news>
  73    <news class="alpha" date="2017 January 17.">
  74          Confluence for parallel r-transition on referred entries of local environments.
  75    </news>
  76    <news class="alpha" date="2016 September 15.">
  77          Confluence for context-sensitive parallel r-transition on terms.
  78    </news>
  79    <news class="alpha" date="2016 April 16.">
  80          Syntactic component completed:
  81          syntax, relocation, s_transition, s_computation, static
  82          (anniversary milestone).
  83    </news>
  84    <news class="alpha" date="2016 March 25.">
  85          Relocation with reference transforming maps (rtmap).
  86    </news>
  87    <news class="alpha" date="2015 October 9.">
  88          λδ-2B is started.
  89    </news>
  90
  91    <subsection name="A">Stage "A" </subsection>
  92    <news class="delta" date="2015 August 27.">
  93          λδ-2A appears too complex and is dismissed.
  94    </news>
  95    <news class="gamma" date="2014 October 28.">
  96          λδ version 2A is released.
  97    </news>
  98    <news class="beta" date="2014 September 9.">
  99          Iterated static type assignment defined (more elegantly)
 100          as a primitive notion.
 101    </news>
 102    <news class="beta" date="2014 June 18.">
 103          Preservation of stratified native validity
 104          for context-sensitive computation on terms.
 105    </news>
 106    <news class="alpha" date="2014 June 9.">
 107          Strong qrst-normalization
 108          for simply typed terms.
 109    </news>
 110    <news class="alpha" date="2014 April 16.">
 111          Lazy equivalence on local environments
 112          added as q-step to rst-computation on closures
 113          (anniversary milestone).
 114    </news>
 115    <news class="alpha" date="2014 January 20.">
 116          Parametrized slicing on local environments
 117          comprises both versions of this operation
 118          (one from basic_1, the other used in basic_2 till now).
 119    </news>
 120    <news class="alpha" date="2013 August 7.">
 121          Passive support for global environments.
 122    </news>
 123    <news class="alpha" date="2013 July 27.">
 124          Reaxiomatized β-reductum as in rt-reduction.
 125    </news>
 126    <news class="alpha" date="2013 July 20.">
 127          Context-sensitive strong rt-normalization
 128          for simply typed terms.
 129    </news>
 130    <news class="alpha" date="2013 April 16.">
 131          Reaxiomatized substitution and reduction
 132          commute with respect to subclosure
 133          (anniversary milestone).
 134    </news>
 135    <news class="alpha" date="2013 March 16.">
 136          Mutual recursive preservation of stratified native validity
 137          for rst-computation on closures.
 138    </news>
 139    <news class="alpha" date="2012 October 16.">
 140          Confluence for context-free parallel reduction on closures.
 141    </news>
 142    <news class="alpha" date="2012 July 26.">
 143          Term binders polarized to control ζ-reduction (not released).
 144    </news>
 145    <news class="alpha" date="2012 April 16.">
 146          Context-sensitive subject equivalence
 147          for atomic arity assignment
 148          (anniversary milestone).
 149    </news>
 150    <news class="alpha" date="2012 March 15.">
 151          Context-sensitive strong normalization
 152          for simply typed terms.
 153    </news>
 154    <news class="alpha" date="2012 January 27.">
 155          Generic candidates of reducibility.
 156    </news>
 157    <news class="alpha" date="2011 September 21.">
 158          Confluence for context-sensitive parallel reduction on terms.
 159    </news>
 160    <news class="alpha" date="2011 September 6.">
 161          Confluence for context-free parallel reduction on terms.
 162    </news>
 163    <news class="alpha" date="2011 April 17.">
 164          λδ-2A is started.
 165    </news>
 166
 167    <section4 name="structure">Logical Structure of the Specification</section4>
 168    <body>This table reports the specification's components and their planes.
 169    </body>
 170    <table name="basic_2_src"/>
 171
 172    <footer/>
 173 </page>