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Re: Options for Eigenvalues

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  • Subject: [mg96140] Re: [mg96100] Options for Eigenvalues
  • From: Bob Hanlon <hanlonr at>
  • Date: Fri, 6 Feb 2009 04:13:39 -0500 (EST)
  • Reply-to: hanlonr at

Options, Definition, or Information show that Eigenvalues has the option 
Method. For example,



Enter an invalid Method

Eigenvalues[{{a, b}, {c, d}}, Method -> Wrong];

Eigenvalues::emeth: The method specified by Method -> Wrong should be 
either Automatic or Arnoldi. >>

It appears that the only valid Method values are Automatic or Arnoldi

Bob Hanlon

On Thu, Feb 5, 2009 at 7:01 AM , Sebastian Meznaric wrote:

> I have recently found out, reading some of the older messages in this
> newsgroup, that Eigenvalues has an undocumented Method option. Does
> someone know what methods, aside from Arnoldi, can be specified and
> what other options there may be?
> Although Mathematica documentation is fairly good, it still leaves
> plenty to be desired.

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