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Re: Simulating the rolling of dices to produce truly random numbers?

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: Simulating the rolling of dices to produce truly random numbers?
Date 2018-01-10 23:16 +0000
Organization A noiseless patient Spider
Message-ID <87bmi18fu3.fsf@bsb.me.uk> (permalink)
References (1 earlier) <h1hc5dhsn0poohj21es31b49q0ha0ih4dn@4ax.com> <p35gi1$p76$2@toylet.eternal-september.org> <tdhc5dd8r79k27r4u1mh74namu3qgkdjc9@4ax.com> <p35grq$qin$3@toylet.eternal-september.org> <09cab11a-2576-4da7-9caf-f35a2496b441@googlegroups.com>

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

> On Wednesday, January 10, 2018 at 5:00:52 PM UTC, Mr. Man-wai Chang wrote:
>> 
>> So there is mechanics that could never be modeled using mathematics and 
>> computers?
>> 
> Basically, the flow of fluids. You can model them by making an arbitrarily
> fine lattice, but you can never describe the behaviour perfectly, and
> small errors accumulate, leading to big changes in results after a few
> steps, depending on your approximations.

Even some very simple mechanical systems exhibit unmanageable
sensitivity to initial conditions, for example,. a double pendulum:

https://www.youtube.com/watch?v=U39RMUzCjiU  (tech. version)

https://www.youtube.com/watch?v=mZ1hF_-cubA  (cool version!)

-- 
Ben.

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Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-10 23:50 +0800
  Re: Simulating the rolling of dices to produce truly random numbers? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-01-10 08:33 -0800
    Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 00:55 +0800
  Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 10:52 -0600
    Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 00:55 +0800
      Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 10:59 -0600
        Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 01:00 +0800
          Re: Simulating the rolling of dices to produce truly random numbers? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-01-10 09:15 -0800
            Re: Simulating the rolling of dices to produce truly random numbers? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-01-10 23:16 +0000
          Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 11:16 -0600
    Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 10:55 -0600
      Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 00:58 +0800
        Re: Simulating the rolling of dices to produce truly random numbers? David Brown <david.brown@hesbynett.no> - 2018-01-10 22:07 +0100
  Re: Simulating the rolling of dices to produce truly random numbers? "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-01-10 08:58 -0800
    Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 00:59 +0800
      Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 11:07 -0600
        Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 01:15 +0800
          Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 11:25 -0600
            Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 01:45 +0800
              Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 12:48 -0600
          Re: Simulating the rolling of dices to produce truly random numbers? "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2018-01-10 09:27 -0800
            Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 01:43 +0800
            Re: Simulating the rolling of dices to produce truly random numbers? David Brown <david.brown@hesbynett.no> - 2018-01-10 22:58 +0100
              Re: Simulating the rolling of dices to produce truly random numbers? "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-01-10 14:18 -0800
        Re: Simulating the rolling of dices to produce truly random numbers? Jerry Stuckle <jstucklex@attglobal.net> - 2018-01-10 13:00 -0500
          Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 13:07 -0600
            Re: Simulating the rolling of dices to produce truly random numbers? Jerry Stuckle <jstucklex@attglobal.net> - 2018-01-11 12:48 -0500
  Re: Simulating the rolling of dices to produce truly random numbers? Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-01-10 10:20 -0700
    Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 01:22 +0800
      Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 11:32 -0600
        Re: Simulating the rolling of dices to produce truly random numbers? Richard Heathfield <rjh@cpax.org.uk> - 2018-01-10 18:15 +0000
          Re: Simulating the rolling of dices to produce truly random numbers? Robert Wessel <robertwessel2@yahoo.com> - 2018-01-10 13:09 -0600
      Re: Simulating the rolling of dices to produce truly random numbers? Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-01-10 10:38 -0700
        Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 01:48 +0800
          Re: Simulating the rolling of dices to produce truly random numbers? Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-01-10 11:43 -0700
    Re: Simulating the rolling of dices to produce truly random numbers? scott@slp53.sl.home (Scott Lurndal) - 2018-01-10 18:20 +0000
      Re: Simulating the rolling of dices to produce truly random numbers? Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2018-01-10 13:23 -0500
        Re: Simulating the rolling of dices to produce truly random numbers? "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2018-01-11 05:16 +0800
  Re: Simulating the rolling of dices to produce truly random numbers? "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-01-10 12:29 -0800
  Re: Simulating the rolling of dices to produce truly random numbers? Alexander Huszagh <ahuszagh@gmail.com> - 2018-01-10 19:19 -0800
    Re: Simulating the rolling of dices to produce truly random numbers? Chad <cdalten@gmail.com> - 2018-01-11 02:52 -0800
      Re: Simulating the rolling of dices to produce truly random numbers? Richard Damon <Richard@Damon-Family.org> - 2018-01-11 07:47 -0500

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