LAPACK  3.9.0
LAPACK: Linear Algebra PACKage
Functions/Subroutines
dlasq2.f File Reference

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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. More...
 
dlasq3
subroutine dlasq3(I0, N0, Z, PP, DMIN, SIGMA, DESIG, QMAX, NFAIL, ITER, NDIV, IEEE, TTYPE, DMIN1, DMIN2, DN, DN1, DN2, G, TAU)
DLASQ3 checks for deflation, computes a shift and calls dqds. Used by sbdsqr.
Definition: dlasq3.f:184
xerbla
subroutine xerbla(SRNAME, INFO)
XERBLA
Definition: xerbla.f:62
ilaenv
integer function ilaenv(ISPEC, NAME, OPTS, N1, N2, N3, N4)
ILAENV
Definition: tstiee.f:83
dlasrt
subroutine dlasrt(ID, N, D, INFO)
DLASRT sorts numbers in increasing or decreasing order.
Definition: dlasrt.f:90
dlamch
double precision function dlamch(CMACH)
DLAMCH
Definition: dlamch.f:70