Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2006
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: critical points of a third order polynomial fit (simplification)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg68481] Re: [mg68466] critical points of a third order polynomial fit (simplification)
  • From: "Chris Chiasson" <chris at chiasson.name>
  • Date: Mon, 7 Aug 2006 01:40:44 -0400 (EDT)
  • References: <200608060656.CAA23460@smc.vnet.net> <5951C758-2C5C-4727-AD67-41E11F62F79E@mimuw.edu.pl> <acbec1a40608060838n1c214499ledaa6ebdc94e0ebc@mail.gmail.com> <A35E92CF-D0AD-4DB3-8BCF-C23ECF0E51A4@mimuw.edu.pl>
  • Sender: owner-wri-mathgroup at wolfram.com

Per offlist discussion with Andrzej Kozlowski, it is seen that
Mathematica is capable of detecting the numerical ill conditioning in
this problem when using arbitrary precision numbers. This can be
tested by appending the following replacements to the definition of
bracket:

/. x_Real?InexactNumberQ :> SetPrecision[x, 14]

/. x_Real?InexactNumberQ :> SetPrecision[x, 32]


  • Prev by Date: NDSolve with boundary condition(s) at infinity?
  • Next by Date: Using Map with function that has options...
  • Previous by thread: critical points of a third order polynomial fit (simplification)
  • Next by thread: Re: critical points of a third order polynomial fit (simplification)