Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2012

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

Search the Archive

Intersection over an index

  • To: mathgroup at smc.vnet.net
  • Subject: [mg128408] Intersection over an index
  • From: Geoffrey Eisenbarth <geoffrey.eisenbarth at gmail.com>
  • Date: Tue, 16 Oct 2012 20:12:11 -0400 (EDT)
  • 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

Given a set of n many matrices A[k], I'd like to find any common eigenvectors. Using

Intersection[Table[Eigenvalues[A[k]],{k,1,n}] doesn't seem to work. For instance:

A[1] = {{-1, -3, 1}, {0, -3, 0}, {-1, -1, -1}};
A[2] = {{-2, -1, 1}, {0, -1, 0}, {-1, 1, -2}};
Intersection[Table[A[p], {p, 1, 2}]]

gives me 
{{{-2, -1, 1}, {0, -1, 0}, {-1, 1, -2}}, {{-1, -3, 1}, {0, -3, 
   0}, {-1, -1, -1}}}


Any suggestions?



  • Prev by Date: Re: 3D plotting problem in Mathematica
  • Next by Date: Re: Is there a BNF for Mathematica?
  • Previous by thread: Re: Plot in function
  • Next by thread: Re: Intersection over an index