X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fweb%2Fbasic_2.ldw.xml;h=28575ff0ea587c7a0b377529bd7140048bd6c21e;hb=bfd440cc2a790741616cae6b375609c6bbdc3b24;hp=fd37f2b13b513f1e72cf38eace6f7eef82ada78c;hpb=361a91ade954f92013da892c62d41e3a7168cfc0;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/web/basic_2.ldw.xml b/matita/matita/contribs/lambdadelta/basic_2/web/basic_2.ldw.xml
index fd37f2b13..28575ff0e 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/web/basic_2.ldw.xml
+++ b/matita/matita/contribs/lambdadelta/basic_2/web/basic_2.ldw.xml
@@ -3,6 +3,7 @@
 <page xmlns="http://lambdadelta.info/"
       description = "\lambda\delta home page"
       title = "\lambda\delta home page"
+      logo = "crux"
       head = "cic:/matita/lambdadelta/basic_2/ (core λδ version 2)"
 >
    <sitemap name="sitemap"/>
@@ -26,20 +27,82 @@
    <table name="basic_2_sum"/>
 
    <subsection name="B">Stage "B"</subsection>
-   <news class="alpha" date="Ongoing.">
-         Context-sensitive subject equivalence
-         for native type assignment.
+   <news class="beta" date="2019 September 3.">
+         Applicability condition is now parametrized
+         with a generic subset of numbers.
+   </news>
+   <news class="beta" date="2019 June 2.">
+         Applicability condition parametrized
+         with an initial interval of numbers
+         allows λδ-2B to generalize both λδ-2A and λδ-1B.
+   </news>
+   <news class="beta" date="2019 April 16.">
+         Extended (λδ-2A) and restricted (λδ-1B) validity is decidable
+         (anniversary milestone).
+   </news>
+   <news class="beta" date="2019 March 25.">
+         Preservation of validity for rt-computation
+         does not need the sort degree parameter
+         (i.e. no induction on the degree).
+   </news>
+   <news class="beta" date="2018 November 1.">
+         Extended (λδ-2A) and restricted (λδ-1B) validity rules justified.
+   </news>
+   <news class="alpha" date="2018 September 21.">
+         λδ-2A completed with
+         confluence of rt-computation and
+         preservation of validity for rt-computation.
+   </news>
+   <news class="alpha" date="2018 June 8.">
+         Behavioral component rt_computation completed.
+   </news>
+   <news class="alpha" date="2018 April 16.">
+         "Big tree" theorem
+         (anniversary milestone).
+   </news>
+   <news class="alpha" date="2018 March 9.">
+         Support for rt-computation completed.
+   </news>
+   <news class="alpha" date="2017 October 17.">
+         Exclusion binder in local environments.
+         Syntactic component updated:
+         syntax, relocation, s_transition, s_computation, static, i_static.
+   </news>
+   <news class="alpha" date="2017 April 16.">
+         Strong rt-normalization
+         for simply typed terms
+         (anniversary milestone).
+   </news>
+   <news class="alpha" date="2017 March 16.">
+         Behavioral component rt_transition completed.
+   </news>
+   <news class="alpha" date="2017 February 19.">
+         Generic candidates of reducibility.
+   </news>
+   <news class="alpha" date="2017 January 17.">
+         Confluence for parallel r-transition on referred entries of local environments.
+   </news>
+   <news class="alpha" date="2016 September 15.">
+         Confluence for context-sensitive parallel r-transition on terms.
+   </news>
+   <news class="alpha" date="2016 April 16.">
+         Syntactic component completed:
+         syntax, relocation, s_transition, s_computation, static
+         (anniversary milestone).
+   </news>
+   <news class="alpha" date="2016 March 25.">
+         Relocation with reference transforming maps (rtmap).
    </news>
-
-   <subsection name="A">Stage "A": "Extending the Applicability Condition"</subsection>
    <news class="alpha" date="2015 October 9.">
-         λδ version 2A2 is started.
+         λδ-2B is started.
    </news>
+
+   <subsection name="A">Stage "A" </subsection>
    <news class="delta" date="2015 August 27.">
-         λδ version 2A1 appears too complex and is dismissed.
+         λδ-2A appears too complex and is dismissed.
    </news>
    <news class="gamma" date="2014 October 28.">
-         λδ version 2A1 is released.
+         λδ-2A is released.
    </news>
    <news class="beta" date="2014 September 9.">
          Iterated static type assignment defined (more elegantly)
@@ -59,7 +122,7 @@
          (anniversary milestone).
    </news>
    <news class="alpha" date="2014 January 20.">
-         Parametrized slicing of local environments
+         Parametrized slicing on local environments
 	 comprises both versions of this operation
 	 (one from basic_1, the other used in basic_2 till now).
    </news>
@@ -98,7 +161,7 @@
          for simply typed terms.
    </news>
    <news class="alpha" date="2012 January 27.">
-         Support for abstract candidates of reducibility.
+         Generic candidates of reducibility.
    </news>
    <news class="alpha" date="2011 September 21.">
          Confluence for context-sensitive parallel reduction on terms.
@@ -107,7 +170,7 @@
          Confluence for context-free parallel reduction on terms.
    </news>
    <news class="alpha" date="2011 April 17.">
-         λδ version 2 is started.
+         λδ-2A is started.
    </news>
 
    <section4 name="structure">Logical Structure of the Specification</section4>