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Sep 25, 2015 at 14:13 history closed David Richerby
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Duplicate of How to prove that a language is not regular?
Sep 25, 2015 at 13:55 vote accept letsBeePolite
Sep 25, 2015 at 13:51 comment added letsBeePolite But my worry is that proof correct? that I did using Myhill-Nerode
Sep 25, 2015 at 12:50 review Close votes
Sep 25, 2015 at 14:18
Sep 25, 2015 at 11:59 answer added J.-E. Pin timeline score: 5
Sep 25, 2015 at 8:20 comment added Yuval Filmus The easiest proof is using Myhill–Nerode, as you outline.
Sep 25, 2015 at 6:39 comment added Raphael Hint: use closure properties. Details are in the question linked by D.W.
Sep 25, 2015 at 6:39 comment added letsBeePolite Yes, thanks for editing. Will keep in mind henceforth.
Sep 25, 2015 at 4:59 history reopened D.W.
Sep 25, 2015 at 4:59 comment added D.W. Please take a look at my edit. Does it accurately reflect your problem?
Sep 25, 2015 at 4:57 history edited D.W. CC BY-SA 3.0
Clean up definition of L and some language.
Sep 25, 2015 at 0:51 review Reopen votes
Sep 25, 2015 at 5:01
Sep 25, 2015 at 0:46 history edited letsBeePolite CC BY-SA 3.0
added 471 characters in body
Sep 25, 2015 at 0:34 history edited letsBeePolite CC BY-SA 3.0
added 471 characters in body
Sep 25, 2015 at 0:25 history closed D.W. Needs details or clarity
Sep 25, 2015 at 0:24 comment added D.W. 1. It's not clear to me what your language $L$ is. Please edit. I'll put this on hold to give you a chance to clarify. 2. Isn't this already covered by cs.stackexchange.com/q/1031/755? Is there a reason this is not a duplicate? 3. What have you tried? Have you tried the techniques listed there? We discourage posts that simply state a problem out of context, and expect the community to solve it. Assuming you tried to solve it yourself and got stuck, it'd be helpful if you wrote your thoughts and what you could not figure out. We're not here to solve your exercises for you.
Sep 25, 2015 at 0:06 history asked letsBeePolite CC BY-SA 3.0