From: chris.danx@ntlworld.com (Danx)
Subject: Re: Turing-undecidable languages (OT)
Date: 8 May 2002 01:24:17 -0700
Date: 2002-05-08T08:24:17+00:00 [thread overview]
Message-ID: <da2da981.0205080024.6576be16@posting.google.com> (raw)
In-Reply-To: ab9fmh$2qh1$1@msunews.cl.msu.edu
"Chad R. Meiners" <crmeiners@hotmail.com> wrote in message news:<ab9fmh$2qh1$1@msunews.cl.msu.edu>...
> This is an excellent question. First, let's rephrase your question to:
>
> If some says, "I'll am going to write a program Y that solves problem X",
> how should he act if told
>
> a) X is not recursive. (This is the same as Robert's recursively
> undecidable)
> b) Program Y may get stuck in an infinite loop.
>
> In case a, Y cannot exist.
Does that mean that if any problem cannot be expressed recursively,
then no program can be coded to solve it? In other words, any problem
that can be solved without recursion, can also be expressed using
recursion and any problem that cannot be solved by recursion cannot be
solved by a computer?
Chris
next prev parent reply other threads:[~2002-05-08 8:24 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-29 11:54 Generation of permutations Reinert Korsnes
2002-04-30 13:52 ` Ted Dennison
2002-04-30 14:20 ` Marin David Condic
2002-05-02 12:32 ` Robert Dewar
2002-05-02 15:47 ` Ted Dennison
2002-05-02 16:16 ` Mark Biggar
2002-05-03 13:04 ` Marin David Condic
2002-05-05 0:52 ` Robert Dewar
2002-05-05 23:11 ` tmoran
2002-05-06 2:13 ` Chad R. Meiners
2002-05-06 13:52 ` Stephen Leake
2002-05-09 17:44 ` Darren New
2002-05-09 18:07 ` Stephen Leake
2002-05-09 20:58 ` Darren New
2002-05-09 23:21 ` tmoran
2002-05-09 23:51 ` Darren New
2002-05-10 3:37 ` tmoran
2002-05-10 3:59 ` Darren New
2002-05-10 13:13 ` Robert Dewar
2002-05-25 16:21 ` Robert I. Eachus
2002-05-09 23:24 ` Robert Dewar
2002-05-09 23:48 ` Robert Dewar
2002-05-10 3:37 ` tmoran
2002-05-10 15:10 ` Chad R. Meiners
2002-05-11 4:04 ` Robert Dewar
2002-05-16 1:35 ` Chad R. Meiners
2002-05-11 4:05 ` Robert Dewar
2002-05-06 15:46 ` Wes Groleau
2002-05-06 16:21 ` Chad R. Meiners
2002-05-06 16:33 ` Darren New
2002-05-07 0:06 ` tmoran
2002-05-07 0:26 ` Darren New
2002-05-07 1:56 ` tmoran
2002-05-07 10:39 ` Robert Dewar
2002-05-07 17:25 ` Chad R. Meiners
2002-05-08 2:27 ` Robert Dewar
2002-05-08 8:44 ` Mats Karlssohn
2002-05-07 17:00 ` Wes Groleau
2002-05-06 21:33 ` Robert Dewar
2002-05-06 17:26 ` Marin David Condic
2002-05-07 7:35 ` tmoran
2002-05-07 13:22 ` Marin David Condic
2002-05-08 5:23 ` tmoran
2002-05-08 14:10 ` Marin David Condic
2002-05-09 16:20 ` Darren New
2002-05-09 19:04 ` tmoran
2002-05-08 16:20 ` Darren New
2002-05-08 17:31 ` tmoran
2002-05-08 17:39 ` Chad R. Meiners
2002-05-07 15:34 ` Darren New
2002-05-07 17:44 ` Chad R. Meiners
2002-05-07 19:58 ` tmoran
2002-05-07 21:05 ` Turing-undecidable languages (OT) Chad R. Meiners
2002-05-08 8:24 ` Danx [this message]
2002-05-08 17:16 ` Chad R. Meiners
2002-05-10 2:37 ` Robert Dewar
2002-05-08 9:16 ` Dmitry A. Kazakov
2002-05-08 17:18 ` Chad R. Meiners
2002-05-09 20:56 ` Dmitry A.Kazakov
2002-05-09 16:18 ` Chad R. Meiners
2002-05-10 2:52 ` Robert Dewar
2002-05-08 2:17 ` Generation of permutations Robert Dewar
2002-05-03 13:13 ` Ted Dennison
2002-05-03 13:24 ` Lutz Donnerhacke
2002-04-30 15:06 ` Hyman Rosen
2002-05-01 8:40 ` Adrian Hoe
2002-05-01 19:53 ` Hyman Rosen
2002-05-11 1:52 ` Steven Deller
2002-05-02 16:24 ` Mark Biggar
2002-04-30 17:12 ` Wes Groleau
2002-04-30 22:57 ` Robert Dewar
2002-05-01 0:54 ` tmoran
2002-05-01 9:42 ` Florian Weimer
2002-05-02 12:34 ` Robert Dewar
2002-05-01 12:43 ` Robert Dewar
2002-05-01 15:05 ` TO WHOM IT MAY CONCERN Wes Groleau
2002-05-02 12:27 ` More on copyright, (Re: TO WHOM IT MAY CONCERN) Robert Dewar
2002-05-08 13:56 ` Wes Groleau
2002-05-08 18:01 ` Robert Dewar
2002-05-08 18:31 ` Hyman Rosen
2002-05-09 13:41 ` Wes Groleau
2002-05-01 12:46 ` Generation of permutations Robert Dewar
2002-05-01 18:22 ` OT:Copyright, was " tmoran
2002-05-01 21:56 ` Robert Dewar
2002-05-01 23:45 ` tmoran
2002-05-02 11:58 ` Robert Dewar
2002-05-01 14:55 ` Wes Groleau
2002-05-02 12:41 ` Robert Dewar
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