CHESWAPR(3)

💖 CHESWAPR(3) — Library Functions Manual, but make it fashion 💖

okay bestie, welcome to the Library Functions Manual page for CHESWAPR(3) — the header path is like /home/abui.../cheswapr.f(3), and this is a Fortran subroutine from LAPACK. It lowkey has one job and it ATE: apply an elementary permutation on the rows and columns of a Hermitian matrix. periodt. 💅

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✨ NAME ✨

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/cheswapr.f

That’s the whole NAME section, no cap — just the source path, being iconic. 🎀

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🌸 SYNOPSIS 🌸

Functions/Subroutines

subroutine CHESWAPR (uplo, n, a, lda, i1, i2)
    CHESWAPR applies an elementary permutation on the rows and columns
    of a Hermitian matrix.

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🦋 Function/Subroutine Documentation 🦋

subroutine CHESWAPR (character uplo, integer n, complex, dimension( lda, n )
    a, integer lda, integer i1, integer i2)

CHESWAPR applies an elementary permutation on the rows and columns of a Hermitian matrix. That’s the whole vibe, and honestly? Slay. ✨

🎀 Purpose

CHESWAPR applies an elementary permutation on the rows and the columns of a hermitian matrix. The way that this subroutine just does its little permutation thing? Obsessed. The source comment spells it hermitian lowercase there — preserving the detail, bestie. 💖

💅 Parameters

• UPLO — UPLO is CHARACTER*1. It specifies whether the details of the factorization are stored as an upper or lower triangular matrix. The exact values are:
  • = '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 COMPLEX array, dimension (LDA,N). On entry, the NB diagonal matrix D and the multipliers used to obtain the factor U or L as computed by CSYTRF.

On exit, if INFO = 0, the (symmetric) inverse of the original matrix. If UPLO = 'U', the upper triangular part of the inverse is formed and the part of A below the diagonal is not referenced; if UPLO = 'L' the lower triangular part of the inverse is formed and the part of A above the diagonal is not referenced. Yes, it literally says (symmetric) right there — we keep the detail, we don’t editorialize. 🫶

• 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 101 of file cheswapr.f.

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💫 Author

Generated automatically by Doxygen for LAPACK from the source code.

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mwah 💋 that’s the whole page, bestie. Signed off by LAPACK, Version 3.12.0, with the footer path /home/abui.../cheswapr.f(3) — no date line on this one, just source/version/path and vibes. fr fr 🌈✨