CHETRS_AA_2STAGE(3)

okay so bestie, welcome to the CHETRS_AA_2STAGE(3) page from the Library Functions Manual — yes, the manual name is folded in right here, and we are serving title + manual realness in one cute little intro. 💅

🎀 NAME 🎀

• /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/chetrs_aa_2stage.f — that's the file this whole page is about, no cap. 🦋

✨ SYNOPSIS ✨

🧚 Functions/Subroutines

the subroutine is right here, bestie, no edits, no chaos:

subroutine CHETRS_AA_2STAGE (uplo, n, nrhs, a, lda, tb, ltb, ipiv,
    ipiv2, b, ldb, info)
    CHETRS_AA_2STAGE

💖 Function/Subroutine Documentation 💖

here's the full signature in all its main-character glory:

subroutine CHETRS_AA_2STAGE (character uplo, integer n, integer nrhs,
    complex, dimension( lda, * ) a, integer lda, complex, dimension( * ) tb,
    integer ltb, integer, dimension( * ) ipiv, integer, dimension( * )
    ipiv2, complex, dimension( ldb, * ) b, integer ldb, integer info)
    CHETRS_AA_2STAGE

🌸 Purpose 🌸

CHETRS_AA_2STAGE solves a system of linear equations A*X = B with a real hermitian matrix A using the factorization A = U**T*T*U or A = L*T*L**T computed by CHETRF_AA_2STAGE.

🍓 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**T*T*U;
  • = 'L': Lower triangular, form is A = L*T*L**T.
• N — N is INTEGER. The order of the matrix A. N >= 0.
• NRHS — NRHS is INTEGER. The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0.
• A — A is COMPLEX array, dimension (LDA,N). Details of factors computed by CHETRF_AA_2STAGE.
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,N).
• TB — TB is COMPLEX array, dimension (LTB). Details of factors computed by CHETRF_AA_2STAGE.
• LTB — LTB is INTEGER. The size of the array TB. LTB >= 4*N.
• IPIV — IPIV is INTEGER array, dimension (N). Details of the interchanges as computed by CHETRF_AA_2STAGE.
• IPIV2 — IPIV2 is INTEGER array, dimension (N). Details of the interchanges as computed by CHETRF_AA_2STAGE.
• B — B is COMPLEX array, dimension (LDB,NRHS). On entry, the right hand side matrix B. On exit, the solution matrix X.
• LDB — LDB is INTEGER. The leading dimension of the array B. LDB >= max(1,N).
• INFO — INFO is 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 139 of file chetrs_aa_2stage.f.

💻 Author (the Doxygen one) 💻

Generated automatically by Doxygen for LAPACK from the source code.

---

final footer vibe: signing off with LAPACK, Version 3.12.0, and source /home/abui...aa_2stage.f(3) — the page doesn't show a date, so no fake date from me, bestie. bye! 🫶