home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.theory
- Path: 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
-
- 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
-