- <news date="2013 April 16.">
- Reaxiomatized substitution and reduction
- commute with respect to subclosure
- (anniversary milestone).
+ <news class="beta" date="2018-11-01.">
+ Extended (λδ-2A) and restricted (λδ-1B) validity rules justified.
+ </news>
+ <news class="alpha" date="2018-09-21.">
+ λδ-2A completed with
+ confluence of rt-computation and
+ preservation of validity for rt-computation.
+ </news>
+ <news class="alpha" date="2018-06-08.">
+ Behavioral component rt_computation completed.