DGET03(3)

💖 NAME 💖

okay so this is the DGET03(3) manual page, aka the dget03.f(3) entry under Library Functions Manual. The NAME is literally this exact file path, no cap:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/dget03.f

✨ SYNOPSIS ✨

🧚 Functions/Subroutines 🧚

       subroutine DGET03 (n, a, lda, ainv, ldainv, work, ldwork, rwork, rcond,
           resid)
           DGET03

🦋 Function/Subroutine Documentation 🦋

This is the full signature, bestie:

   subroutine DGET03 (integer n, double precision, dimension( lda, * ) a,
       integer lda, double precision, dimension( ldainv, * ) ainv, integer
       ldainv, double precision, dimension( ldwork, * ) work, integer ldwork,
       double precision, dimension( * ) rwork, double precision rcond, double
       precision resid)
       DGET03

🎀 Purpose 🎀

DGET03 computes the residual for a general matrix times its inverse. The literal purpose block says:

!>
!> DGET03 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.
!>

🌸 Parameters 🌸

N

N is INTEGER; it's the number of rows and columns of the matrix A. It has to be N >= 0. 💅

A

A is DOUBLE PRECISION array, dimension (LDA,N). It's the original N x N matrix A. 🫶

LDA

LDA is INTEGER; it's the leading dimension of the array A, and LDA >= max(1,N). ✨

AINV

AINV is DOUBLE PRECISION array, dimension (LDAINV,N). It's the inverse of the matrix A. 🦋

LDAINV

LDAINV is INTEGER; it's the leading dimension of the array AINV, and LDAINV >= max(1,N). 🌸

WORK

WORK is DOUBLE PRECISION array, dimension (LDWORK,N). That's the whole note, bestie. 💜

LDWORK

LDWORK is INTEGER; it's the leading dimension of the array WORK, and LDWORK >= max(1,N). 🎀

RWORK

RWORK is DOUBLE PRECISION array, dimension (N). 🍓

RCOND

RCOND is DOUBLE PRECISION; it's the reciprocal of the condition number of A, computed as ( 1/norm(A) ) / norm(AINV). 🔥

RESID

RESID is DOUBLE PRECISION; it's 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 107 of file dget03.f. 😌

👑 Author 👑

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

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xoxo, bestie 💖 — this page is from LAPACK Version 3.12.0, with the footer pointing at /home/abui...IN/dget03.f(3). periodt. 🎀