SGET03(3)

💖 NAME

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/sget03.f

This is the sget03.f(3) page from the Library Functions Manual, bestie 💅✨

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✨ SYNOPSIS

🌸 Functions/Subroutines

   subroutine SGET03 (n, a, lda, ainv, ldainv, work, ldwork, rwork, rcond,
       resid)
       SGET03

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🦋 Function/Subroutine Documentation

   subroutine SGET03 (integer n, real, dimension( lda, * ) a, integer lda,
       real, dimension( ldainv, * ) ainv, integer ldainv, real, dimension(
       ldwork, * ) work, integer ldwork, real, dimension( * ) rwork, real
       rcond, real resid)
       SGET03

🌸 Purpose

okay so SGET03 computes the residual for a general matrix times its inverse, and the formula is literally:

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

where EPS is the machine epsilon. That's the whole vibe ✨

🎀 Parameters

• N — N is INTEGER. The number of rows and columns of the matrix A. N >= 0.
• A — A is REAL 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 REAL 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 REAL 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 107 of file sget03.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 🫶 catch you later from LAPACK Version 3.12.0 and the sget03.f(3) page — footer shorthand path was /home/abui...IN/sget03.f(3), and it didn't show a date so I'm not inventing one 🙈💖