SRC/zla_syrcond_c.f(3)

💖 NAME 💖

SRC/zla_syrcond_c.f — bestie, this is the page for that file, and it’s from the Library Functions Manual. We’re in SRC/zla_syrcond_c.f(3) territory 💅

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🦋 SYNOPSIS 🦋

✨ Functions/Subroutines ✨

double precision function zla_syrcond_c (uplo, n, a, lda, af, ldaf,
    ipiv, c, capply, info, work, rwork)

ZLA_SYRCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for symmetric indefinite matrices. No cap, that’s the whole vibe 🔥

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💅 Function/Subroutine Documentation 💅

double precision function zla_syrcond_c (character uplo, integer n,
    complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension(
    ldaf, * ) af, integer ldaf, integer, dimension( * ) ipiv, double
    precision, dimension( * ) c, logical capply, integer info, complex*16,
    dimension( * ) work, double precision, dimension( * ) rwork)

ZLA_SYRCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for symmetric indefinite matrices. Okay so that’s the headline, and now we get into the details 🌸

🌸 Purpose 🌸

ZLA_SYRCOND_C computes the infinity norm condition number of op(A) * inv(diag(C)) where C is a DOUBLE PRECISION vector. Literally what it says on the label, bestie ✨

🎀 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.
• 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 ZSYTRF.
• 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 ZSYTRF.
• C — C is DOUBLE PRECISION array, dimension (N); the vector C in the formula op(A) * inv(diag(C)).
• CAPPLY — CAPPLY is LOGICAL; if .TRUE. then access the vector C in the formula above.
• 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.

👑 Author 👑

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

Definition at line 137 of file zla_syrcond_c.f.

🧚 Author 🧚

Generated automatically by Doxygen for LAPACK from the source code.

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That’s the whole page, bestie 🫶 Sign-off from LAPACK Version 3.12.0, here on SRC/zla_syrcond_c.f(3) 🎀✨