LAPACK 3.12.0
LAPACK: Linear Algebra PACKage

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Functions/Subroutines  
subroutine  dlasq2 (n, z, info) 
DLASQ2 computes all the eigenvalues of the symmetric positive definite tridiagonal matrix associated with the qd Array Z to high relative accuracy. Used by sbdsqr and sstegr.  