SRC/dgesc2.f(3)

💖 NAME 💖

SRC/dgesc2.f — that's the name, bestie. This page is from the Library Functions Manual, and its page tag is SRC/dgesc2.f(3).

✨ SYNOPSIS ✨

🫶 Functions/Subroutines 🫶

• subroutine dgesc2 (n, a, lda, rhs, ipiv, jpiv, scale) — DGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

🧚 Function/Subroutine Documentation 🧚

🎀 subroutine dgesc2 🎀

subroutine dgesc2 (integer n, double precision, dimension( lda, * ) a,
       integer lda, double precision, dimension( * ) rhs, integer, dimension( *
       ) ipiv, integer, dimension( * ) jpiv, double precision scale)

DGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

🦋 Purpose: 🦋

!>
!> DGESC2 solves a system of linear equations
!>
!>           A * X = scale* RHS
!>
!> with a general N-by-N matrix A using the LU factorization with
!> complete pivoting computed by DGETC2.
!>

💅 Parameters 💅

• N — N is INTEGER. The order of the matrix A.
• A — A is DOUBLE PRECISION array, dimension (LDA,N). On entry, the LU part of the factorization of the n-by-n matrix A computed by DGETC2: A = P * L * U * Q.
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1, N).
• RHS — RHS is DOUBLE PRECISION array, dimension (N). On entry, the right hand side vector b. On exit, the solution vector X.
• IPIV — IPIV is INTEGER array, dimension (N). The pivot indices; for 1 <= i <= N, row i of the matrix has been interchanged with row IPIV(i).
• JPIV — JPIV is INTEGER array, dimension (N). The pivot indices; for 1 <= j <= N, column j of the matrix has been interchanged with column JPIV(j).
• SCALE — SCALE is DOUBLE PRECISION. On exit, SCALE contains the scale factor. SCALE is chosen 0 <= SCALE <= 1 to prevent overflow in the solution.

🌸 Author 🌸

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

🌺 Contributors: 🌺

Bo Kagstrom and Peter Poromaa, Department of Computing Science, Umea University, S-901 87 Umea, Sweden.

Definition at line 113 of file dgesc2.f.

👑 Author 👑

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That's the whole page, bestie 🫶. Cute footer tea: LAPACK Version 3.12.0, source page SRC/dgesc2.f(3). There's no separate date printed in the original footer, so we're not inventing one — no cap. 💅