<table name="basic_2_sum"/>
<subsection name="B">Stage "B"</subsection>
+ <news class="beta" date="2019 June 2.">
+ Parametrized applicability condition
+ allows λδ-2B to generalize both λδ-1A and λδ-1B.
+ </news>
<news class="beta" date="2019 April 16.">
- Extended (λδ-2) and restricted (λδ-1) validity is decidable
+ Extended (λδ-2A) and restricted (λδ-1A) validity is decidable
(anniversary milestone).
</news>
<news class="beta" date="2019 March 25.">
(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.
+ Extended (λδ-2A) and restricted (λδ-1A) type rules justified.
</news>
<news class="alpha" date="2018 September 21.">
λδ-2A completed with