On Wednesday, September 14, 2016 at 5:35:53 PM UTC+5:30, Jussi Piitulainen wrote: > Mathematical discussions tend to acknowledge only alternation (union), > concatenation and iteration (Kleene star) as operations, unless they > specifically focus on some other operations that can, in principle, be > expressed in terms of those three. There are many such. > > Without further regex operations it makes sense to include a special > regular expression that matches nothing. Otherwise a very simple NFA > (DFA) has no corresponding regex, which can be considered awkward.
Not sure if I parse you correct — Assuming “a very simple DFA” you mean “The DFA with only one state, no final state?” If yes then yes thats the nub of the matter More later… [Will switch from being a CS-teacher to net-disconnected music teacher for few days :-) ] -- https://mail.python.org/mailman/listinfo/python-list
