ZGET02(3)

📦 version 3.12.0, in opensuse-leap 16.0

okay bestie, welcome to the Library Functions Manual page for zget02.f(3) — yes, the LAPACK girlies said “let’s check a residual,” and honestly? iconic. 💅 This one is a ZGET02 subroutine situation, and we’re gonna keep every little detail because that’s the vibe. No cap.

🎀 NAME

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/zget02.f

that’s the file path, bestie. The source file herself. 🫶

✨ SYNOPSIS

🧚 Functions/Subroutines

       subroutine ZGET02 (trans, m, n, nrhs, a, lda, x, ldx, b, ldb, rwork,
           resid)
           ZGET02

💖 Function/Subroutine Documentation

   subroutine ZGET02 (character trans, integer m, integer n, integer nrhs,
       complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension(
       ldx, * ) x, integer ldx, complex*16, dimension( ldb, * ) b, integer ldb,
       double precision, dimension( * ) rwork, double precision resid)
       ZGET02

🧚 Purpose

ZGET02 computes the residual for a solution of a system of linear equations op(A)*X = B:

RESID = norm(B - op(A)*X) / ( norm(op(A)) * norm(X) * EPS ),

where op(A) = A, A**T, or A**H, depending on TRANS, and EPS is the machine epsilon. That’s the whole tea, no cap. 🍓

🌸 Parameters

okay, parameter-by-parameter vibe check. Don’t skip, she’s thorough. 💖

🌈 TRANS

TRANS is CHARACTER*1

Specifies the form of the system of equations:

  • = 'N': A * X = B (No transpose)
  • = 'T': A**T * X = B (Transpose)
  • = 'C': A**H * X = B (Conjugate transpose)

🦋 M

M is INTEGER

The number of rows of the matrix A. M >= 0.

🎀 N

N is INTEGER

The number of columns of the matrix A. N >= 0.

💜 NRHS

NRHS is INTEGER

The number of columns of B, the matrix of right hand sides. NRHS >= 0.

🔥 A

A is COMPLEX*16 array, dimension (LDA,N)

The original M x N matrix A.

⭐ LDA

LDA is INTEGER

The leading dimension of the array A. LDA >= max(1,M).

🦋 X

X is COMPLEX*16 array, dimension (LDX,NRHS)

The computed solution vectors for the system of linear equations.

🌸 LDX

LDX is INTEGER

The leading dimension of the array X. If TRANS = 'N', LDX >= max(1,N); if TRANS = 'T' or 'C', LDX >= max(1,M).

🍓 B

B is COMPLEX*16 array, dimension (LDB,NRHS)

On entry, the right hand side vectors for the system of linear equations.

On exit, B is overwritten with the difference B - op(A)*X.

🌈 LDB

LDB is INTEGER

The leading dimension of the array B. IF TRANS = 'N', LDB >= max(1,M); if TRANS = 'T' or 'C', LDB >= max(1,N).

🧚 RWORK

RWORK is DOUBLE PRECISION array, dimension (M)

that’s the whole note, bestie. 🎀

👑 RESID

RESID is DOUBLE PRECISION

The maximum over the number of right hand sides of norm(B - op(A)*X) / ( norm(op(A)) * norm(X) * EPS ).

👑 Author

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

Definition at line 132 of file zget02.f.

📜 Author

Generated automatically by Doxygen for LAPACK from the source code.

and that’s the page, bestie! Signed off with LAPACK Version 3.12.0 and the footer path /home/abui...IN/zget02.f(3) — mwah 💖✨

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