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Re: And they say C is obscure

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: And they say C is obscure
Date 2017-06-05 15:03 +0100
Organization A noiseless patient Spider
Message-ID <87zidmlega.fsf@bsb.me.uk> (permalink)
References (16 earlier) <MPG.3394f70240f64bb98ad12@news.eternal-september.org> <1df0c26b-87ac-4f3a-b970-ad202d3d2f67@googlegroups.com> <MPG.339e761f4962faf598ad56@news.eternal-september.org> <87inkan1iv.fsf@bsb.me.uk> <ab557755-e671-4160-b6f9-dc0ea869d4f9@googlegroups.com>

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Malcolm McLean <malcolm.arthur.mclean@gmail.com> writes:

> On Monday, June 5, 2017 at 11:59:27 AM UTC+1, Ben Bacarisse wrote:
>> "J. Clarke" <j.clarke.873638@gmail.com> writes:
>> 
>> > In article <1df0c26b-87ac-4f3a-b970-ad202d3d2f67@googlegroups.com>, 
>> > malcolm.arthur.mclean@gmail.com says...
>> >> 
>> >> On Sunday, May 28, 2017 at 9:03:12 PM UTC+1, J. Clarke wrote:
>> >> > In article <176287ff-7977-420e-ad58-9f92fd29037d@googlegroups.com>, 
>> >> > 
>> >> > Visualizing a 4D array isn't any real trick, you know--row, column, page, 
>> >> > book does it for me.  Or row, column, page, file folder.
>> >> >
>> >> That only works if book 1, page 1, row1, column 1 , is a whole book away from 
>> >> book2, page 1, row 1, column 1. Just as if I live in 2 High Street, Manchester
>> >> then I'm a considerable distance from 2 High Street, Leeds. 
>> >> 
>> >> If in fact the data items are adjacent, the visualisation breaks down.
>> >
>> > Why does the visualization "break down"?  You can index across books, 
>> > shelves, bookcases, etc just fine.
>> 
>> I'm not going to guess what Malcolm means but, for me, N indexing
>> dimensions are not the same as N dimensions in a metric (or topological)
>> space.  I can image the array above quite easily, but I can't image the
>> neighbourhood of a point on the 6-dimensional surface of a sphere in
>> R^7.  I have no trouble imaging the simplest knot in R^3 but I'd have to
>> resort to symbols and rules to know anything about knots in R^7.
>> 
>> When you add a metric or a topology to the space my imagination fails
>> me.
>> 
> My main argument is based on the reverse, an interchangeability of nesting
> and indexing dimensions.

Since I don't know what you mean by this interchangeability, I can't
comment.  Why is this nesting/indexing interchangeability the reverse of
my comment about metrics and topology?

<snip>
-- 
Ben.

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Thread

Re: And they say C is obscure "J. Clarke" <j.clarke.873638@gmail.com> - 2017-05-28 16:03 -0400
  Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-05-30 02:21 -0700
    Re: And they say C is obscure "J. Clarke" <j.clarke.873638@gmail.com> - 2017-06-04 20:55 -0400
      Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-05 01:44 -0700
        Re: And they say C is obscure raltbos@xs4all.nl (Richard Bos) - 2017-06-05 09:47 +0000
          Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-05 03:51 -0700
            Re: And they say C is obscure Gareth Owen <gwowen@gmail.com> - 2017-06-05 15:43 +0100
              Re: And they say C is obscure Tim Rentsch <txr@alumni.caltech.edu> - 2017-06-05 13:51 -0700
              Re: And they say C is obscure raltbos@xs4all.nl (Richard Bos) - 2017-06-06 17:26 +0000
      Re: And they say C is obscure Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-05 11:59 +0100
        Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-05 04:12 -0700
          Re: And they say C is obscure asetofsymbols@gmail.com - 2017-06-05 05:54 -0700
          Re: And they say C is obscure Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-05 15:03 +0100
            Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-05 07:22 -0700
              Re: And they say C is obscure GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-06-05 16:22 +0200
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-05 07:40 -0700
                Re: And they say C is obscure GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-06-05 16:41 +0200
              Re: And they say C is obscure Gareth Owen <gwowen@gmail.com> - 2017-06-05 15:44 +0100
              Re: And they say C is obscure Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-05 16:12 +0100
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-05 09:08 -0700
                Re: And they say C is obscure David Kleinecke <dkleinecke@gmail.com> - 2017-06-05 12:08 -0700
                Re: And they say C is obscure asetofsymbols@gmail.com - 2017-06-05 13:10 -0700
                Re: And they say C is obscure Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-05 23:54 +0100
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-06 01:15 -0700
                Re: And they say C is obscure David Brown <david.brown@hesbynett.no> - 2017-06-06 11:10 +0200
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-06 02:39 -0700
                Re: And they say C is obscure David Brown <david.brown@hesbynett.no> - 2017-06-06 12:15 +0200
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-06 03:47 -0700
                Re: And they say C is obscure David Brown <david.brown@hesbynett.no> - 2017-06-06 13:09 +0200
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-06 05:26 -0700
                Re: And they say C is obscure GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-06-06 14:25 +0200
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-06 05:34 -0700
                Re: And they say C is obscure GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-06-06 15:41 +0200
                Re: And they say C is obscure David Brown <david.brown@hesbynett.no> - 2017-06-06 15:04 +0200
                Re: And they say C is obscure raltbos@xs4all.nl (Richard Bos) - 2017-06-06 17:37 +0000
                Re: And they say C is obscure David Brown <david.brown@hesbynett.no> - 2017-06-07 10:17 +0200
                Re: And they say C is obscure Keith Thompson <kst-u@mib.org> - 2017-06-06 08:49 -0700
                Re: And they say C is obscure Gareth Owen <gwowen@gmail.com> - 2017-06-06 19:17 +0100
                Re: And they say C is obscure Gareth Owen <gwowen@gmail.com> - 2017-06-06 19:16 +0100
                Re: And they say C is obscure Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-06 12:44 +0100
                Re: And they say C is obscure raltbos@xs4all.nl (Richard Bos) - 2017-06-06 17:34 +0000
                Re: And they say C is obscure David Brown <david.brown@hesbynett.no> - 2017-06-06 21:14 +0200
                Re: And they say C is obscure Tim Rentsch <txr@alumni.caltech.edu> - 2017-06-06 13:10 -0700
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-06 14:34 -0700
                Re: And they say C is obscure Keith Thompson <kst-u@mib.org> - 2017-06-06 15:27 -0700
                Re: And they say C is obscure Tim Rentsch <txr@alumni.caltech.edu> - 2017-06-11 16:06 -0700
                Re: And they say C is obscure Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-06 12:10 +0100
                Re: And they say C is obscure Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-06-06 04:36 -0700
                Re: And they say C is obscure raltbos@xs4all.nl (Richard Bos) - 2017-06-06 17:32 +0000
              Re: And they say C is obscure David Brown <david.brown@hesbynett.no> - 2017-06-05 17:58 +0200

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