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[Lapack] What's the best lapack routine to use?

Additionally ...

If your matrix is sparse and you only want a selected set of eigenvalues
and corresponding vectors
(e.g. largest eigenvalues in principal component analysis)
then you might want to try ARPACK or FEAST.


On Thu, Jan 15, 2015 at 1:38 AM, Kevin Cahill <kevinecahill@Domain.Removed> 

What's the best lapack routine to use to find the eigenvalues of a huge
real symmetric matrix whose eigenvalues are positive or zero?

Best wishes,

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