[Numpy-discussion] inverting and calculating eigenvalues for many small matrices

[Gael Varoquaux]

On Tue, Jul 12, 2011 at 12:16:29PM -0400, greg whittier wrote:
> Gael, your code addresses inverses, but I take it something similar for
> eigenvalues of a matrix bigger than 5x5 doesn't exists since a
> closed-form solution doesn't exist for finding polynomials roots for
> order > 5?

I guess so :).

> The ones I'm looking at now happen to be 3x3, so I was thinking of
> using http://en.wikipedia.org/wiki/Eigenvalue_algorithm#Eigenvalues_of_a_Symmetric_3x3_Matrix
> but I might have anywhere from 2 to 10 at some point. 

I am afraid that this is beyond my skills. Sorry ;$.

G