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