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Groups > comp.soft-sys.math.mathematica > #3799

Re: Solve never calls Equal?

From Andrzej Kozlowski <akoz@mimuw.edu.pl>
Newsgroups comp.soft-sys.math.mathematica
Subject Re: Solve never calls Equal?
Date 2011-07-19 10:56 +0000
Organization Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID <j03nsm$a09$1@smc.vnet.net> (permalink)
References (1 earlier) <ivovvt$qpa$1@smc.vnet.net> <201107160941.FAA08237@smc.vnet.net> <7BBB2BCC-0234-4BDA-A129-3270EBA623CE@mimuw.edu.pl> <ivuc93$gth$1@smc.vnet.net> <201107181014.GAA26917@smc.vnet.net>

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On 18 Jul 2011, at 12:14, Richard Fateman wrote:

> Clearly one cannot, in general, find an
> exact solution to a transcendental equation using rational arithmetic,

> so I was a little surprised by Reduce working just fine, here.

Of course one does not use "arithmetic". You still don't understand what 
is going on here, but I am now at an airport during a break in a long 
flight so won't be able to educated you how it is really done (and why 
your fix "works") just yet. But if you ask nicely, maybe in the future 
;-)

Andrzej Kozlowski

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Thread

Re: Numerical accuracy/precision - this is a bug or a feature? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-15 09:07 +0000
  Solve never calls Equal? Richard Fateman <fateman@cs.berkeley.edu> - 2011-07-16 09:42 +0000
  Re: Solve never calls Equal? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-17 10:08 +0000
  Re: Solve never calls Equal? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-17 10:06 +0000
  Re: Solve never calls Equal? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-17 10:07 +0000
    Re: Solve never calls Equal? Richard Fateman <fateman@cs.berkeley.edu> - 2011-07-18 10:15 +0000
    Re: Solve never calls Equal? Richard Fateman <fateman@cs.berkeley.edu> - 2011-07-18 10:17 +0000
    Re: Solve never calls Equal? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-18 10:16 +0000
      Re: Solve never calls Equal? Richard Fateman <fateman@cs.berkeley.edu> - 2011-07-19 10:55 +0000
    Re: Solve never calls Equal? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-19 10:56 +0000
    Re: Solve never calls Equal? Richard Fateman <fateman@eecs.berkeley.edu> - 2011-07-19 11:00 +0000
    Re: Solve never calls Equal? Daniel Lichtblau <danl@wolfram.com> - 2011-07-19 11:01 +0000
  Re: Solve never calls Equal? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-17 10:08 +0000
  Re: Solve never calls Equal? Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-07-18 10:13 +0000

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