POV-Ray : Newsgroups : povray.off-topic : Today's XKCD .. : Re: Today's XKCD .. Server Time
5 Sep 2024 11:22:15 EDT (-0400)
  Re: Today's XKCD ..  
From: Warp
Date: 10 Oct 2009 13:27:08
Message: <4ad0c3ec@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> Darren New schrieb:
> > clipka wrote:
> > 
> >  > as it requires an infinitely long memory tape
> > 
> > No it doesn't. It only requires an unbounded memory tape. There's a huge 
> > difference.

> There is a huge difference indeed, and that's why you're mistaken. A 
> loop of memory tape would also fit the bill of "unbounded"; however, it 
> doesn't do for a true Turing machine.

  A loop of memory tape does not, in fact, provide an unbounded amount
of memory. It provides a finite, fixed amount of memory, hence very
definitely not unbounded.

-- 
                                                          - Warp


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