TESTING/LIN/zget01.f(3)

💖 NAME 💖

Hey bestie, welcome to the Library Functions Manual page for TESTING/LIN/zget01.f(3) — it’s giving major ZGET01 main-character energy, and honestly? Obsessed. 💅✨

✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

       subroutine zget01 (m, n, a, lda, afac, ldafac, ipiv, rwork, resid)
           ZGET01

🌸 Function/Subroutine Documentation 🌸

   subroutine zget01 (integer m, integer n, complex*16, dimension( lda, * ) a,
       integer lda, complex*16, dimension( ldafac, * ) afac, integer ldafac,
       integer, dimension( * ) ipiv, double precision, dimension( * ) rwork,
       double precision resid)

🦋 Purpose 🦋

Okay so ZGET01 reconstructs a matrix A from its L*U factorization and computes the residual — periodt. 🫶

norm(L*U - A) / ( N * norm(A) * EPS ),

where EPS is the machine epsilon. It’s literally the vibe check for the factorization, and the math said what it said. 😭🔥

🍓 Parameters 🍓

• 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. ✨
• A — A is COMPLEX*16 array, dimension (LDA,N). The original M x N matrix A. This is the main character matrix, no cap. 💖
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,M). Respect the leading dimension, bestie. 💅
• AFAC — AFAC is COMPLEX*16 array, dimension (LDAFAC,N). The factored form of the matrix A. AFAC contains the factors L and U from the L*U factorization as computed by ZGETRF. Overwritten with the reconstructed matrix, and then with the difference L*U - A. Not me getting overwritten twice — iconic behavior. 😭🦋
• LDAFAC — LDAFAC is INTEGER. The leading dimension of the array AFAC. LDAFAC >= max(1,M). 🎀
• IPIV — IPIV is INTEGER array, dimension (N). The pivot indices from ZGETRF. Pivot queen behavior. 👑
• RWORK — RWORK is DOUBLE PRECISION array, dimension (M). 🌈
• RESID — RESID is DOUBLE PRECISION. norm(L*U - A) / ( N * norm(A) * EPS ). The final residual, serving looks. ⭐

👑 Author 👑

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

Definition at line 106 of file zget01.f. 📌

💜 Author 💜

Generated automatically by Doxygen for LAPACK from the source code. 🤖💖

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Mwah 💋 — this cute little page is from TESTING/LIN/zget01.f(3), and the footer says LAPACK Version 3.12.0. No date got printed, so I’m not inventing one, bestie. 🫶✨