X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fweb%2Fbasic_2.ldw.xml;h=a5c53bf3e17a212da07212849aec0276de36e8a5;hb=31be09cc0d040577917783e050e1d38c0daa8f01;hp=3aff8e423f73848c7ca05cf6e211207152b6032a;hpb=084ea7868f6153effc18e8ee1c0e6cdb34d181c0;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 3aff8e423..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 +27,16 @@
    <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="alpha" date="2018 November 1.">
+   <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.">