SRC/zsyswapr.f(3)

💖 NAME 💖

SRC/zsyswapr.f — that's the title, bestie, and this page comes from the Library Functions Manual. We're talking about the zsyswapr routine, no cap.

✨ SYNOPSIS ✨

🌸 Functions/Subroutines 🌸

subroutine zsyswapr (uplo, n, a, lda, i1, i2)
    ZSYSWAPR

🦋 Function/Subroutine Documentation 🦋

subroutine zsyswapr (character uplo, integer n, complex*16, dimension( lda,
       * ) a, integer lda, integer i1, integer i2)

ZSYSWAPR — all caps, all attitude, and literally the star of this page.

🎀 Purpose 🎀

ZSYSWAPR applies an elementary permutation on the rows and the columns of a symmetric matrix. It's giving “swap the rows and columns, keep the symmetric-matrix situation cute.” 💅

🌈 Parameters 🌈

• UPLO — UPLO is CHARACTER*1. 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 COMPLEX*16 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 zsyswapr.f.

🫶 Author 🫶

Generated automatically by Doxygen for LAPACK from the source code.

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