Because

nag_zhpcon (f07puc) nag_zhpcon (f07puc) estimates the condition number of a complex Hermitian indefinite matrix A, where A has been factorized by nag_zhptrf (f07prc), using packed storage

void nag_open_file (const char *filename, Integer mode, Nag_FileID *fileid,

nag_open_file (x04acc) nag_open_file (x04acc) opens a file for reading, writing or appending, and returns an associated file identifier

f07 – Linear Equations (LAPACK) f07fsc

nag_zpotrs (f07fsc) nag_zpotrs (f07fsc) solves a complex Hermitian positive-definite system of linear equations with multiple right-hand sides, AX B, where A has been factorized by nag_zpotrf (f07frc)

1: order – Nag_OrderType Input

nag_dtrexc (f08qfc) nag_dtrexc (f08qfc) reorders the Schur factorization of a real general matrix

f08 – Least-squares and Eigenvalue Problems (LAPACK) f08wwc

nag_zggbak (f08wwc) nag_zggbak (f08wwc) forms the right or left eigenvectors of the real generalized eigenvalue problem Ax Bx, by backward transformation on the computed eigenvectors given by nag_ztgevc (f08yxc). It is necessary to call this function only if the optional balancing function nag_zggbal (f08wvc) was previously called to balance the matrix pair ðA; BÞ

g12 – Survival Analysis g12zac

nag_surviv_risk_sets (g12zac) nag_surviv_risk_sets (g12zac) creates the risk sets associated with the Cox proportional hazards model for fixed covariates