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

NAME 💖

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

Library Functions Manual page for /home/abui.../zsyconv.f(3) — yes bestie, that’s the header folded in, now let’s get into it 🫶

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SYNOPSIS 🎀

Functions/Subroutines 💅

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

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Function/Subroutine Documentation ✨

ZSYCONV 🦋

subroutine ZSYCONV (character uplo, character way, integer n, complex*16,
    dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv,
    complex*16, dimension( * ) e, integer info)

Purpose 🎯

Okay so ZSYCONV takes the A that ZHETRF gave you and converts it into L and D, or does the reverse. It gets the nondiagonal elements of D — those come back in the workspace — and then applies or reverses the permutation done in TRF. Periodt 💅

Parameters 🌸

• UPLO — CHARACTER*1. This is the orientation switch: it says 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*16 array, dimension (LDA,N). The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZSYTRF.
• 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 ZSYTRF.
• E — COMPLEX*16 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 zsyconv.f.

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Author 💜

Generated automatically by Doxygen for LAPACK from the source code. No cap, that’s literally what the page says 🫶

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Sign-off time, bestie: this iconic little page is from LAPACK Version 3.12.0, and its footer points back to /home/abui.../zsyconv.f(3) — slay 💅✨