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MathGroup Archive 2012

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domain restriction in NSolve does not work

  • To: mathgroup at smc.vnet.net
  • Subject: [mg128848] domain restriction in NSolve does not work
  • From: niieldo at googlemail.com
  • Date: Fri, 30 Nov 2012 05:56:45 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Delivered-to: l-mathgroup@wolfram.com
  • Delivered-to: mathgroup-newout@smc.vnet.net
  • Delivered-to: mathgroup-newsend@smc.vnet.net

Dear all,

I have encountered the problem that restricting domains in NSolve does not work.
I get the same results for NSolve[x^5 - 2 x + 3 == 0, x, Reals] as with NSolve[x^5 - 2 x + 3 == 0, x], namely {{x -> -1.42361}, {x -> -0.246729 - 1.32082 I}, {x -> -0.246729 + 
    1.32082 I}, {x -> 0.958532 - 0.498428 I}, {x -> 
   0.958532 + 0.498428 I}}

I.e. Mathematica actually does not apply the restriction. 

Does anyone have a solution for this? Do I have to adjust the settings somewhere?

many thanks in advance
Niels




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