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MathGroup Archive 2001

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Re: Exact real parts

  • To: mathgroup at smc.vnet.net
  • Subject: [mg31226] Re: Exact real parts
  • From: bghiggins at ucdavis.edu (Brian Higgins)
  • Date: Fri, 19 Oct 2001 03:12:31 -0400 (EDT)
  • References: <9qjjv7$j8i$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Mark, Try this,

h = Table[1/(i + j - 1), {i,3}, {j,3}];

p=Eigenvalues[h];

Map[ComplexExpand[#] &, p]

Cheers,

Brian



"DIAMOND Mark R." <dot at dot.dot> wrote in message news:<9qjjv7$j8i$1 at smc.vnet.net>...
> Is it possible to get Mathematica to provide the exact real parts of
> something like the 3x3 Hilbert matrix?
> 
> h = Table[1/(i + j - 1), {i, 3}, {j, 3}];
> Eigenvalues[h]
> 
> N and Chop will obviously give their approximations.
> 
> Cheers


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