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[Lapack] Eigenvectors calculation - wrong sign

Dear Santiago,

Remember that vectors give a direction so that if x is an eigenvector of 
A then alpha.x (alpha non-zero) is also an eigenvector of A.

I'm not sure what you mean by "Lapack taken from Numerical Recipes in 
C"?  Why not take the LAPACK routines from LAPACK?

Since version 6, MATLAB also uses LAPACK.

Best wishes,

Sven Hammarling.

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