ZHETRI(3)

🦋 NAME 🦋

okay bestie, welcome to the zhetri.f(3) page from the LAPACK Library Functions Manual — manual name: LAPACK. The NAME path is exactly:

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

This is the ZHETRI subroutine page, and it's giving "inverse of a complex Hermitian indefinite matrix" energy. 💅

✨ SYNOPSIS ✨

Functions/Subroutines

subroutine ZHETRI (uplo, n, a, lda, ipiv, work, info)
    ZHETRI

🫶 Function/Subroutine Documentation 🫶

subroutine ZHETRI (character uplo, integer n, complex*16, dimension( lda, *
       ) a, integer lda, integer, dimension( * ) ipiv, complex*16, dimension( *
       ) work, integer info)
       ZHETRI

💖 Purpose 💖

ZHETRI computes the inverse of a complex Hermitian indefinite matrix A using the factorization A = U*D*U**H or A = L*D*L**H computed by ZHETRF. That's the whole assignment, and it ate. 🔥

🌸 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**H;
  • 'L': Lower triangular, form is A = L*D*L**H.
• N — N is INTEGER. The order of the matrix A. N >= 0.
• A — A is COMPLEX*16 array, dimension (LDA,N). On entry, the block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZHETRF. On exit, if INFO = 0, the (Hermitian) 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. 🦋
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,N).
• IPIV — IPIV is INTEGER array, dimension (N). Details of the interchanges and the block structure of D as determined by ZHETRF.
• WORK — WORK is COMPLEX*16 array, dimension (N).
• INFO — INFO is INTEGER.
  • = 0: successful exit
  • < 0: if INFO = -i, the i-th argument had an illegal value
  • > 0: if INFO = i, D(i,i) = 0; the matrix is singular and its inverse could not be computed.

👑 Author 👑

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

Definition at line 113 of file zhetri.f.

⭐ Author ⭐

Generated automatically by Doxygen for LAPACK from the source code.

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Cute sign-off, bestie: this page is from LAPACK Version 3.12.0, footer path /home/abui...RC/zhetri.f(3) — so that's the generated source/version/date footer sign-off, and I’m obsessed 💖✨🎀