dlasd4.f - Man Page

Synopsis

Functions/Subroutines

subroutine dlasd4 (N, I, D, Z, DELTA, RHO, SIGMA, WORK, INFO)
DLASD4 computes the square root of the i-th updated eigenvalue of a positive symmetric rank-one modification to a positive diagonal matrix. Used by dbdsdc.

Author

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Info

Thu Apr 1 2021 Version 3.9.1 LAPACK