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MathGroup Archive 2006

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RE: What does " 1.' " mean ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66698] RE: [mg66661] What does " 1.' " mean ?
  • From: "David Park" <djmp at earthlink.net>
  • Date: Sat, 27 May 2006 03:52:27 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

It's an approximate number, as opposed to an exact number like 1 which would
disappear. As soon as you include a decimal point in any number in an
expression, Mathematica will convert the entire expression to approximate
numbers. So you might see if you can eliminate the decimal points when
entering an expression to NSolve. Or you might prefer to use NDSolve and get
InterpolationFunctions as answers.

You might want to look at Section 3.1 in The Mathematica Book on Numbers.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/

From: Arkalen [mailto:skizzir at yahoo.com]
To: mathgroup at smc.vnet.net


Warning : I am a complete newbie at using Mathematica.

I have used NSolve to solve systems of non linear equations, and it gives
me results which look good except they contain several "1.'abc" where abc
are parameters. (that's "one period apostrophe").
I assume it's shorthand notation for something but I can't tell what, the
Mathematica experts I might ask are all gone for a week and I can't find
it in the book.

Anyone know what it means ?



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