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MathGroup Archive 2004

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Re: Re: bug in IntegerPart ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg48014] Re: [mg47970] Re: bug in IntegerPart ?
  • From: Daniel Lichtblau <danl at wolfram.com>
  • Date: Wed, 5 May 2004 08:11:28 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

[After this message, I am stopping this thread.  I urge those who still
 want to argue these issues or "flame" each other
 to commmunicate privately - Moderator]


AC/PK/LS:

I had rather hoped that this thread would peter out, but instead
it just morphs into all sorts things. Let us see...


AC wrote (variously):

  > RealDigits[0.35]
  > => {{3, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 0}
  > 3.500000000000000
  >
  > RealDigits[1.65-1.3]
  > => {{3, 4, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9}, 0}
  >
  > 3.499999999999999
  >
  > 1.65-1.3 // FullForm
  > => 0.34999999999999987`

I fail to see what this shows. Moreover if you do a greater or
less  check you will find that they are regarded as equal.
Trichotomy applies,  even for approximate numbers. (And
speaking of trichotomy...)


  >> Interesting phrase, "step out of your box", from someone posting
  >> anonymously.
  >
  > I am just protecting my employment just like you do. I prefer to post
  > anonymously what I truly think, then selling my name to support some
  > party line.

I did not see a point to this until I heard a rumor that some
people in-house may know from where these posts originate,
and apparently think there may be a security clearance involved.
I guess even anonymity has its costa.


  >> But all it might gain
  >> you is a paragraph in the folklore Guide to Usenet Cranks.
  >
  > That is typical. Calling names usually replaces loosing logical
  > ground.

I stand corrected. Apparently I am behind on the lingo and
the applicable term is "kooks".


Daniel Lichtblau
Wolfram Research






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