SRC/zsptrs.f(3)

💖 SRC/zsptrs.f

okay so this page is literally from the Library Functions Manual — very much giving “I’m a LAPACK page and I know things” energy. ✨

🌸 NAME

SRC/zsptrs.f

✨ SYNOPSIS

Functions/Subroutines

       subroutine zsptrs (uplo, n, nrhs, ap, ipiv, b, ldb, info)
           ZSPTRS

🦋 Function/Subroutine Documentation

       subroutine zsptrs (character uplo, integer n, integer nrhs, complex*16,
       dimension( * ) ap, integer, dimension( * ) ipiv, complex*16, dimension(
       ldb, * ) b, integer ldb, integer info)

ZSPTRS

💡 Purpose

okay so bestie, ZSPTRS solves a system of linear equations A*X = B with a complex symmetric matrix A stored in packed format, using the factorization A = U*D*U**T or A = L*D*L**T computed by ZSPTRF. That’s the whole vibe. 🫶

🎀 Parameters

• UPLO — UPLO is CHARACTER*1. Tells you 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.
• 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.
• AP — AP is COMPLEX*16 array, dimension (N*(N+1)/2). The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZSPTRF, stored as a packed triangular matrix.
• IPIV — IPIV is INTEGER array, dimension (N). Details of the interchanges and the block structure of D as determined by ZSPTRF.
• B — B is COMPLEX*16 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 114 of file zsptrs.f.

🌈 Author

📝 Generated automatically by Doxygen for LAPACK from the source code.

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xoxo, bestie — LAPACK Version 3.12.0 💅✨, and the footer energy is SRC/zsptrs.f(3) 🎀