SRC/csptrs.f(3)

📦
version 3.12.1 · 4 versions
, in arch rolling

💖 NAME 💖

SRC/csptrs.f — okay bestie, this is the Library Functions Manual page for the csptrs subroutine. It’s giving packed-matrix main character energy, and we are gonna cover every single arg. 💅

✨ SYNOPSIS ✨

🧚 Functions/Subroutines

subroutine csptrs (uplo, n, nrhs, ap, ipiv, b, ldb, info)
    CSPTRS

🌸 Function/Subroutine Documentation 🌸

💫 subroutine csptrs

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

🎯 Purpose

No cap: CSPTRS 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 CSPTRF. Periodt. ✨

🧾 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*D*U**T; = 'L': Lower triangular, form is A = L*D*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.
  • AP — COMPLEX 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 CSPTRF, stored as a packed triangular matrix.
  • IPIV — INTEGER array, dimension (N). Details of the interchanges and the block structure of D as determined by CSPTRF.
  • B — COMPLEX 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

Definition at line 114 of file csptrs.f.

🌈 Author 🌈

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That’s the whole page, bestie — you ate. 💅✨ LAPACK Version 3.12.0 · SRC/csptrs.f(3). The footer doesn’t show a separate date, so I’m not inventing one. 🫶

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