/home/abui.../csyconv.f(3)

💅 csyconv.f — Library Functions Manual 💅

okay so bestie, this page is from the Library Functions Manual, and it's serving pure LAPACK subroutine energy. no cap. 🦋

🌸 NAME 🌸

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

That's the file. 💖

🦋 SYNOPSIS 🦋

✨ Functions/Subroutines ✨

subroutine CSYCONV (uplo, way, n, a, lda, ipiv, e, info)
    CSYCONV

🧚 Function/Subroutine Documentation 🧚

The signature is right here, bestie — character-for-character realness:

subroutine CSYCONV (character uplo, character way, integer n, complex,
     dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv,
     complex, dimension( * ) e, integer info)
    CSYCONV

🎀 Purpose 🎀

okay so CSYCONV converts an A given by TRF into L and D, and vice-versa. It gets the non-diag elements of D (those are returned in workspace) and applies or reverses the permutation done in TRF. slay. ✨

✨ Parameters ✨

• UPLO — 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. 💅
• WAY — CHARACTER*1. = 'C': Convert; = 'R': Revert. 🦋
• N — INTEGER. The order of the matrix A. N >= 0.
• A — COMPLEX array, dimension (LDA,N). The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by CSYTRF.
• LDA — INTEGER. The leading dimension of the array A. LDA >= max(1,N).
• IPIV — INTEGER array, dimension (N). Details of the interchanges and the block structure of D as determined by CSYTRF.
• E — COMPLEX array, dimension (N). E stores the supdiagonal/subdiagonal of the symmetric 1-by-1 or 2-by-2 block diagonal matrix D in LDLT. 🫶
• INFO — INTEGER. = 0: successful exit; < 0: if INFO = -i, the i-th argument had an illegal value. 😭

👑 Author 👑

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

Definition at line 113 of file csyconv.f.

🩷 Author 🩷

Generated automatically by Doxygen for LAPACK from the source code.

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