SSYTRS_AA_2STAGE(3)

✨ NAME ✨

Okay so this is SSYTRS_AA_2STAGE(3), from the Library Functions Manual, and the source file lives right here:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/ssytrs_aa_2stage.f

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🌸 SYNOPSIS 🌸

✨ Functions/Subroutines ✨

Bestie, the call looks like this:

subroutine SSYTRS_AA_2STAGE (uplo, n, nrhs, a, lda, tb, ltb, ipiv, ipiv2, b, ldb, info)

And the routine name is, obviously:

SSYTRS_AA_2STAGE

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🛠️ Function/Subroutine Documentation 🛠️

The full Fortran signature, exactly as written:

   subroutine SSYTRS_AA_2STAGE (character uplo, integer n, integer nrhs, real,
       dimension( lda, * ) a, integer lda, real, dimension( * ) tb, integer
       ltb, integer, dimension( * ) ipiv, integer, dimension( * ) ipiv2, real,
       dimension( ldb, * ) b, integer ldb, integer info)

SSYTRS_AA_2STAGE

🎯 Purpose 🎯

The whole point: SSYTRS_AA_2STAGE solves a system of linear equations A*X = B with a real symmetric matrix A, using the factorization A = U**T*T*U or A = L*T*L**T computed by SSYTRF_AA_2STAGE.

💅 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**T*T*U;
  • = 'L': Lower triangular, form is A = L*T*L**T.
• N — INTEGER. The order of the matrix A. N >= 0.
• NRHS — INTEGER. The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0.
• A — REAL array, dimension (LDA,N). Details of factors computed by SSYTRF_AA_2STAGE.
• LDA — INTEGER. The leading dimension of the array A. LDA >= max(1,N).
• TB — REAL array, dimension (LTB). Details of factors computed by SSYTRF_AA_2STAGE.
• LTB — INTEGER. The size of the array TB. LTB >= 4*N.
• IPIV — INTEGER array, dimension (N). Details of the interchanges as computed by SSYTRF_AA_2STAGE.
• IPIV2 — INTEGER array, dimension (N). Details of the interchanges as computed by SSYTRF_AA_2STAGE.
• B — REAL array, dimension (LDB,NRHS). On entry, the right hand side matrix B. On exit, the solution matrix X.
• LDB — INTEGER. The leading dimension of the array B. LDB >= max(1,N).
• 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 137 of file ssytrs_aa_2stage.f.

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🦋 Author 🦋

Generated automatically by Doxygen for LAPACK from the source code.

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Signed, sealed, and slayed by LAPACK Version 3.12.0 — footer path: /home/abui...aa_2stage.f(3). Bye bestie! 💖✨