Article View: comp.theory
Article #1710Re: 2 stack PDA and other questions
From: R. Sritharan
Date: Sun, 13 Dec 1992 23:57
Date: Sun, 13 Dec 1992 23:57
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In article <1992Dec13.162048.14632@miavx1.acs.muohio.edu> khmak@miavx1.acs.muohio.edu writes:
>A few days ago someone posted a few questions that I was also curious about
>knowing the answer to. Here they are:
>
>
>Why is a 2 stack PDA equivalent to a turing machine?
>Why is it important to know if there is at least one decision problem that is
>undecidable?
>
>Who cares if P=NP? Or what is the significance of the question "Is P=NP"?
>
>Here is one of mine:
>
>Why is L={www|wE{a,b}+} not contect free?
>
>
>Thank you for the information.
>
>Karl
and here is the previous post that is referred to.
>>Article: 3636 of comp.theory
>>Newsgroups: comp.theory
>>Subject: quit
>>Message-ID: <1992Dec11.113208.14609@miavx1.acs.muohio.edu>
>>From: jmcrider@miavx1.acs.muohio.edu
>>Date: 11 Dec 92 11:32:08 -0500
>>Followup-To: comp.theory
>>Distribution: world
>>Organization: Miami University Academic Computer Service"
>>Summary: sorry about the subject
>>Lines: 14
>>I have a few questions that you wizards should be able to answer easily.
>>Why is a two stack PDA equivalent to a Turing machine?
>>Why is it important to know that there is at least one problem that is
>>undecidable?
>>Who cares if P=NP? What is the significance?
>>Thanks alot
>>JMcrider
Why do I get the feeling that someone is trying to get
solutions to his/her home work problems ? Please note
that both the messages have originated from the same
site.
R. Sritharan
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Newsgroups: comp.theory Path: arc1-ca.pugleaf.net!sparky!uunet!vuse.vanderbilt.edu!rst From: rst@vuse.vanderbilt.edu (R. Sritharan) Subject: Re: 2 stack PDA and other questions Message-ID: <Bz82J5.5Er@vuse.vanderbilt.edu> Sender: news@vuse.vanderbilt.edu Nntp-Posting-Host: ferrari Organization: Vanderbilt University School of Engineering, Nashville, TN, USA References: <1992Dec13.162048.14632@miavx1.acs.muohio.edu> Date: Sun, 13 Dec 1992 23:57:05 GMT Lines: 57