Timeline for Union of finite and non-regular language [duplicate]

9 events

when toggle format	what		by	license	comment
Jan 30, 2015 at 10:26	history	closed	D.W.♦ Juho David Richerby R B Raphael		Duplicate of How to prove that a language is not regular?
Jan 30, 2015 at 10:25	history	edited	Raphael		edited tags
S Jan 29, 2015 at 20:39	history	suggested	lucasoliveira	CC BY-SA 3.0	Latex Edit
Jan 29, 2015 at 19:09	review	Suggested edits
S Jan 29, 2015 at 20:39
Jan 26, 2015 at 22:53	review	Close votes
Jan 30, 2015 at 10:30
Jan 26, 2015 at 22:36	comment	added	D.W.♦		We expect you to make a serious effort before asking here. What methods do you know for proving a language isn't regular? Have you tried each of them? Where did you get stuck, specifically? It looks like you need to make more of an effort on your own -- your textbook will have many worked examples of techniques for proving that specific languages are not regular. So, spend some time trying each one. P.S. I recommend you get clearer on the difference between "$C \cup B$ isn't necessarily regular" vs "$C \cup B$ is never regular".
Jan 23, 2015 at 15:58	answer	added	Dave Clarke		timeline score: 5
Jan 23, 2015 at 15:12	history	edited	Dave Clarke	CC BY-SA 3.0	deleted 14 characters in body
Jan 23, 2015 at 15:08	history	asked	jreing	CC BY-SA 3.0