SRC/zla_porcond_x.f(3)

🌸 NAME 🌸

okay bestie, say hi to SRC/zla_porcond_x.f 💖 this is the SRC/zla_porcond_x.f(3) page from the Library Functions Manual, and it's all about that one Fortran file. iconic behavior, no cap.

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✨ SYNOPSIS ✨

Functions/Subroutines

Here's the callable main character:

double precision function zla_porcond_x (uplo, n, a, lda, af, ldaf, x,
    info, work, rwork)

And the one-line vibe check: ZLA_PORCOND_X computes the infinity norm condition number of op(A)*diag(x) for Hermitian positive-definite matrices.

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💅 Function/Subroutine Documentation 💅

Full signature, served exactly as written:

double precision function zla_porcond_x (character uplo, integer n,
    complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension(
    ldaf, * ) af, integer ldaf, complex*16, dimension( * ) x, integer info,
    complex*16, dimension( * ) work, double precision, dimension( * ) rwork)

ZLA_PORCOND_X computes the infinity norm condition number of op(A)*diag(x) for Hermitian positive-definite matrices.

🎀 Purpose 🎀

This is the purpose block, preserved in its natural habitat:

!>
!>    ZLA_PORCOND_X Computes the infinity norm condition number of
!>    op(A) * diag(X) where X is a COMPLEX*16 vector.
!>

🫶 Parameters 🫶

Every parameter is getting its moment, bestie. no skips, no cuts.

UPLO

!>          UPLO is CHARACTER*1
!>       = 'U':  Upper triangle of A is stored;
!>       = 'L':  Lower triangle of A is stored.
!>

N

!>          N is INTEGER
!>     The number of linear equations, i.e., the order of the
!>     matrix A.  N >= 0.
!>

A

!>          A is COMPLEX*16 array, dimension (LDA,N)
!>     On entry, the N-by-N matrix A.
!>

LDA

!>          LDA is INTEGER
!>     The leading dimension of the array A.  LDA >= max(1,N).
!>

AF

!>          AF is COMPLEX*16 array, dimension (LDAF,N)
!>     The triangular factor U or L from the Cholesky factorization
!>     A = U**H*U or A = L*L**H, as computed by ZPOTRF.
!>

LDAF

!>          LDAF is INTEGER
!>     The leading dimension of the array AF.  LDAF >= max(1,N).
!>

X

!>          X is COMPLEX*16 array, dimension (N)
!>     The vector X in the formula op(A) * diag(X).
!>

INFO

!>          INFO is INTEGER
!>       = 0:  Successful exit.
!>     i > 0:  The ith argument is invalid.
!>

WORK

!>          WORK is COMPLEX*16 array, dimension (2*N).
!>     Workspace.
!>

RWORK

!>          RWORK is DOUBLE PRECISION array, dimension (N).
!>     Workspace.
!>

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👑 Author 👑

The author credits are giving institutional excellence:

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

Definition at line 122 of file zla_porcond_x.f.

🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code.

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xoxo, your LAPACK bestie 💖 — this page is from LAPACK Version 3.12.0, source SRC/zla_porcond_x.f(3). periodt ✨