LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
zlahqr.f File Reference

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Functions/Subroutines

subroutine zlahqr (WANTT, WANTZ, N, ILO, IHI, H, LDH, W, ILOZ, IHIZ, Z, LDZ, INFO)
 ZLAHQR computes the eigenvalues and Schur factorization of an upper Hessenberg matrix, using the double-shift/single-shift QR algorithm. More...