ZLA_HERPVGRW(3)

📦 version 3.12.0, in opensuse-leap 16.0

hiii bestie 💖 welcome to ZLA_HERPVGRW(3) from the Library Functions Manual. This page is giving “LAPACK source file on main character energy,” and the header/footer path it keeps flashing is /home/abui..._herpvgrw.f(3).

✨ NAME ✨

okay so the file this page documents is literally:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/zla_herpvgrw.f

periodt 💅

🌸 SYNOPSIS 🌸

💫 Functions/Subroutines 💫

   Functions/Subroutines
       double precision function ZLA_HERPVGRW (uplo, n, info, a, lda, af, ldaf,
           ipiv, work)
           ZLA_HERPVGRW

🦋 Function/Subroutine Documentation 🦋

   double precision function ZLA_HERPVGRW (character*1 uplo, integer n, integer
       info, complex*16, dimension( lda, * ) a, integer lda, complex*16,
       dimension( ldaf, * ) af, integer ldaf, integer, dimension( * ) ipiv,
       double precision, dimension( * ) work)
       ZLA_HERPVGRW

💖 Purpose 💖

ZLA_HERPVGRW computes the reciprocal pivot growth factor norm(A)/norm(U). The exact line here is: The norm is used. If this is much less than 1, the stability of the LU factorization of the (equilibrated) matrix A could be poor. This also means that the solution X, estimated condition numbers, and error bounds could be unreliable. ngl that’s the whole vibe check 🫶

🌟 Parameters 🌟

  • 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.
  • INFO — INFO is INTEGER. The value of INFO returned from ZHETRF, .i.e., the pivot in column INFO is exactly 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 block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZHETRF.
  • LDAF — LDAF is INTEGER. The leading dimension of the array AF. LDAF >= max(1,N).
  • IPIV — IPIV is INTEGER array, dimension (N). Details of the interchanges and the block structure of D as determined by ZHETRF.
  • WORK — WORK is DOUBLE PRECISION array, dimension (2*N).

👑 Author 👑

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

🧚 Definition at line 🧚

Definition at line 121 of file zla_herpvgrw.f.

🦋 Author 🦋

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Signed off by the footer, bestie: LAPACK, Version 3.12.0, and the footer path /home/abui..._herpvgrw.f(3). There’s no separate date on this page, so that’s the whole cute receipt 💅✨

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