SRC/dsyswapr.f(3)

💖 NAME 💖

SRC/dsyswapr.f — okay bestie, this is the Library Functions Manual page for SRC/dsyswapr.f, and it’s giving “Fortran subroutine that does row-and-column swaps on a symmetric matrix” energy. Periodt.

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✨ SYNOPSIS ✨

🌸 Functions/Subroutines 🌸

• subroutine dsyswapr (uplo, n, a, lda, i1, i2) — DSYSWAPR applies an elementary permutation on the rows and columns of a symmetric matrix.

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🌟 Function/Subroutine Documentation 🌟

subroutine dsyswapr (character uplo, integer n, double precision, dimension( lda, * ) a, integer lda, integer i1, integer i2)

DSYSWAPR applies an elementary permutation on the rows and columns of a symmetric matrix.

🎯 Purpose 🎯

Bestie, listen: DSYSWAPR applies an elementary permutation on the rows and the columns of a symmetric matrix. That’s the whole main-character job. 💅

🧾 Parameters 🧾

• UPLO — UPLO is CHARACTER*1. It specifies whether the details of the factorization are stored as an upper or lower triangular matrix.
  • = 'U': Upper triangular, form is A = U*D*U**T;
  • = 'L': Lower triangular, form is A = L*D*L**T.
• N — N is INTEGER. The order of the matrix A. N >= 0.
• A — A is DOUBLE PRECISION array, dimension (LDA,*). On entry, the N-by-N matrix A. On exit, the permuted matrix where the rows I1 and I2 and columns I1 and I2 are interchanged. If UPLO = 'U', the interchanges are applied to the upper triangular part and the strictly lower triangular part of A is not referenced; if UPLO = 'L', the interchanges are applied to the lower triangular part and the part of A above the diagonal is not referenced.
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,N).
• I1 — I1 is INTEGER. Index of the first row to swap.
• I2 — I2 is INTEGER. Index of the second row to swap.

👑 Author 👑

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

Definition at line 99 of file dsyswapr.f.

👑 Author 👑

Generated automatically by Doxygen for LAPACK from the source code.

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And that’s the whole page, bestie 🫶💖 — the footer energy is LAPACK Version 3.12.0 for SRC/dsyswapr.f(3), generated automatically by Doxygen for LAPACK from the source code, and there’s literally no date line to report. No cap. ✨