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 June 2.">
  31          Parametrized applicability condition
  32          allows λδ-2B to generalize both λδ-1A and λδ-1B.
  33    </news>
  34    <news class="beta" date="2019 April 16.">
  35          Extended (λδ-2A) and restricted (λδ-1A) validity is decidable
  36          (anniversary milestone).
  37    </news>
  38    <news class="beta" date="2019 March 25.">
  39          Preservation of validity for rt-computation
  40          does not need the sort degree parameter
  41          (i.e. no induction on the degree).
  42    </news>
  43    <news class="beta" date="2018 November 1.">
  44          Extended (λδ-2A) and restricted (λδ-1A) type rules justified.
  45    </news>
  46    <news class="alpha" date="2018 September 21.">
  47          λδ-2A completed with
  48          confluence of rt-computation and
  49          preservation of validity for rt-computation.
  50    </news>
  51    <news class="alpha" date="2018 June 8.">
  52          Behavioral component rt_computation completed.
  53    </news>
  54    <news class="alpha" date="2018 April 16.">
  55          "Big tree" theorem
  56          (anniversary milestone).
  57    </news>
  58    <news class="alpha" date="2018 March 9.">
  59          Support for rt-computation completed.
  60    </news>
  61    <news class="alpha" date="2017 October 17.">
  62          Exclusion binder in local environments.
  63          Syntactic component updated:
  64          syntax, relocation, s_transition, s_computation, static, i_static.
  65    </news>
  66    <news class="alpha" date="2017 April 16.">
  67          Strong rt-normalization
  68          for simply typed terms
  69          (anniversary milestone).
  70    </news>
  71    <news class="alpha" date="2017 March 16.">
  72          Behavioral component rt_transition completed.
  73    </news>
  74    <news class="alpha" date="2017 February 19.">
  75          Generic candidates of reducibility.
  76    </news>
  77    <news class="alpha" date="2017 January 17.">
  78          Confluence for parallel r-transition on referred entries of local environments.
  79    </news>
  80    <news class="alpha" date="2016 September 15.">
  81          Confluence for context-sensitive parallel r-transition on terms.
  82    </news>
  83    <news class="alpha" date="2016 April 16.">
  84          Syntactic component completed:
  85          syntax, relocation, s_transition, s_computation, static
  86          (anniversary milestone).
  87    </news>
  88    <news class="alpha" date="2016 March 25.">
  89          Relocation with reference transforming maps (rtmap).
  90    </news>
  91    <news class="alpha" date="2015 October 9.">
  92          λδ-2B is started.
  93    </news>
  94
  95    <subsection name="A">Stage "A" </subsection>
  96    <news class="delta" date="2015 August 27.">
  97          λδ-2A appears too complex and is dismissed.
  98    </news>
  99    <news class="gamma" date="2014 October 28.">
 100          λδ version 2A is released.
 101    </news>
 102    <news class="beta" date="2014 September 9.">
 103          Iterated static type assignment defined (more elegantly)
 104          as a primitive notion.
 105    </news>
 106    <news class="beta" date="2014 June 18.">
 107          Preservation of stratified native validity
 108          for context-sensitive computation on terms.
 109    </news>
 110    <news class="alpha" date="2014 June 9.">
 111          Strong qrst-normalization
 112          for simply typed terms.
 113    </news>
 114    <news class="alpha" date="2014 April 16.">
 115          Lazy equivalence on local environments
 116          added as q-step to rst-computation on closures
 117          (anniversary milestone).
 118    </news>
 119    <news class="alpha" date="2014 January 20.">
 120          Parametrized slicing on local environments
 121          comprises both versions of this operation
 122          (one from basic_1, the other used in basic_2 till now).
 123    </news>
 124    <news class="alpha" date="2013 August 7.">
 125          Passive support for global environments.
 126    </news>
 127    <news class="alpha" date="2013 July 27.">
 128          Reaxiomatized β-reductum as in rt-reduction.
 129    </news>
 130    <news class="alpha" date="2013 July 20.">
 131          Context-sensitive strong rt-normalization
 132          for simply typed terms.
 133    </news>
 134    <news class="alpha" date="2013 April 16.">
 135          Reaxiomatized substitution and reduction
 136          commute with respect to subclosure
 137          (anniversary milestone).
 138    </news>
 139    <news class="alpha" date="2013 March 16.">
 140          Mutual recursive preservation of stratified native validity
 141          for rst-computation on closures.
 142    </news>
 143    <news class="alpha" date="2012 October 16.">
 144          Confluence for context-free parallel reduction on closures.
 145    </news>
 146    <news class="alpha" date="2012 July 26.">
 147          Term binders polarized to control ζ-reduction (not released).
 148    </news>
 149    <news class="alpha" date="2012 April 16.">
 150          Context-sensitive subject equivalence
 151          for atomic arity assignment
 152          (anniversary milestone).
 153    </news>
 154    <news class="alpha" date="2012 March 15.">
 155          Context-sensitive strong normalization
 156          for simply typed terms.
 157    </news>
 158    <news class="alpha" date="2012 January 27.">
 159          Generic candidates of reducibility.
 160    </news>
 161    <news class="alpha" date="2011 September 21.">
 162          Confluence for context-sensitive parallel reduction on terms.
 163    </news>
 164    <news class="alpha" date="2011 September 6.">
 165          Confluence for context-free parallel reduction on terms.
 166    </news>
 167    <news class="alpha" date="2011 April 17.">
 168          λδ-2A is started.
 169    </news>
 170
 171    <section4 name="structure">Logical Structure of the Specification</section4>
 172    <body>This table reports the specification's components and their planes.
 173    </body>
 174    <table name="basic_2_src"/>
 175
 176    <footer/>
 177 </page>