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=a5c53bf3e17a212da07212849aec0276de36e8a5;hb=31be09cc0d040577917783e050e1d38c0daa8f01;hp=39ffd838a4fd57e0a4c80a187cae53eb00576225;hpb=cac0166656e08399eaaf1a1e19f0ccea28c36d39;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 39ffd838a..a5c53bf3e 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
@@ -27,13 +27,23 @@
    <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 April 16.">
+         Extended (λδ-2) and restricted (λδ-1) 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-2) and restricted (λδ-1) type 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>
-
-   <subsection name="A2">Stage "A2": "Extending the Applicability Condition"</subsection>
-
    <news class="alpha" date="2018 June 8.">
          Behavioral component rt_computation completed.
    </news>
@@ -75,15 +85,15 @@
          Relocation with reference transforming maps (rtmap).
    </news>
    <news class="alpha" date="2015 October 9.">
-         λδ version 2A2 is started.
+         λδ-2B is started.
    </news>
 
-   <subsection name="A1">Stage "A1": "Extending the Applicability Condition"</subsection>
+   <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 version 2A is released.
    </news>
    <news class="beta" date="2014 September 9.">
          Iterated static type assignment defined (more elegantly)
@@ -151,7 +161,7 @@
          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>