TESTING/LIN/zqrt12.f(3)

💖 NAME 💖

TESTING/LIN/zqrt12.f — hi bestie, welcome to the Library Functions Manual page for TESTING/LIN/zqrt12.f(3). This is the ZQRT12 function’s little corner of the LAPACK testing universe. ✨

✨ SYNOPSIS ✨

Functions/Subroutines

       double precision function zqrt12 (m, n, a, lda, s, work, lwork, rwork)
           ZQRT12

🦋 Function/Subroutine Documentation 🦋

Here’s the full signature, and yes, it’s giving “double precision function” main character energy:

       double precision function zqrt12 (integer m, integer n, complex*16,
           dimension( lda, * ) a, integer lda, double precision, dimension( * ) s,
           complex*16, dimension( lwork ) work, integer lwork, double precision,
           dimension( * ) rwork)
           ZQRT12

🎀 Purpose 🎀

ZQRT12 computes the singular values — spelled svlues' in the source, and we’re keeping that iconique typo — of the upper trapezoid of A(1:M,1:N), then returns this ratio:

|| svlues - s||/(||s||*eps*max(M,N))

No cap, that’s the whole purpose. 💅

🌸 Parameters 🌸

• M — INTEGER; the number of rows of the matrix A.
• N — INTEGER; the number of columns of the matrix A.
• A — COMPLEX*16 array, dimension (LDA,N); the M-by-N matrix A. Only the upper trapezoid is referenced. 👀
• LDA — INTEGER; the leading dimension of the array A.
• S — DOUBLE PRECISION array, dimension (min(M,N)); the singular values of the matrix A. 💖
• WORK — COMPLEX*16 array, dimension (LWORK).
• LWORK — INTEGER; the length of the array WORK. The requirement is LWORK >= M*N + 2*min(M,N) + max(M,N). Respect the bound, bestie.
• RWORK — DOUBLE PRECISION array, dimension (2*min(M,N)).

💅 Author 💅

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

Definition at line 95 of file zqrt12.f. 👑

🫶 Author 🫶

Generated automatically by Doxygen for LAPACK from the source code — yes, that’s the generated-author section doing its little cameo. 🦋

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💖 That’s the whole page! Footer tea: LAPACK, Version 3.12.0, page TESTING/LIN/zqrt12.f(3) — and no separate date is listed in the footer, so don’t come for me. Periodt. 💅✨