CGET03(3)

💅 CGET03(3) — Library Functions Manual 💅

okay so this is the Library Functions Manual entry for CGET03(3), and it’s giving very specific LAPACK energy. let’s get into it bestie 🫶

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🎀 NAME 🎀

the NAME section on this page is literally just the source path, no short description, no cap:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/cget03.f

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✨ SYNOPSIS ✨

🦋 Functions/Subroutines 🦋

the signature under Functions/Subroutines is this exact one:

       subroutine CGET03 (n, a, lda, ainv, ldainv, work, ldwork, rwork, rcond,
           resid)
           CGET03

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🧚 Function/Subroutine Documentation 🧚

🌸 subroutine CGET03 🌸

this is the full documentation signature, and yes it has the whole type-and-dimension moment going on:

   subroutine CGET03 (integer n, complex, dimension( lda, * ) a, integer lda,
       complex, dimension( ldainv, * ) ainv, integer ldainv, complex,
       dimension( ldwork, * ) work, integer ldwork, real, dimension( * ) rwork,
       real rcond, real resid)
       CGET03

💖 Purpose 💖

bestie, CGET03 computes the residual for a general matrix times its inverse:

norm( I - AINV*A ) / ( N * norm(A) * norm(AINV) * EPS ),

where EPS is the machine epsilon. that’s the whole purpose, no cap ✨

🍓 Parameters 🍓

• N — N is INTEGER. The number of rows and columns of the matrix A. N >= 0.
• A — A is COMPLEX array, dimension (LDA,N). The original N x N matrix A.
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,N).
• AINV — AINV is COMPLEX array, dimension (LDAINV,N). The inverse of the matrix A.
• LDAINV — LDAINV is INTEGER. The leading dimension of the array AINV. LDAINV >= max(1,N).
• WORK — WORK is COMPLEX array, dimension (LDWORK,N).
• LDWORK — LDWORK is INTEGER. The leading dimension of the array WORK. LDWORK >= max(1,N).
• RWORK — RWORK is REAL array, dimension (N).
• RCOND — RCOND is REAL. The reciprocal of the condition number of A, computed as ( 1/norm(A) ) / norm(AINV).
• RESID — RESID is REAL. norm(I - AINV*A) / ( N * norm(A) * norm(AINV) * EPS )

🌺 Author 🌺

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

📍 Definition at line 108 of file cget03.f. 📍

Definition at line 108 of file cget03.f.

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👑 Author 👑

Generated automatically by Doxygen for LAPACK from the source code.

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okay that’s the whole page, bestie 🫶 the footer energy is LAPACK Version 3.12.0 plus the path /home/abui...IN/cget03.f(3); no separate date line in this one, periodt 💅✨