SRC/ssptrs.f(3)

📦
version 3.12.1 · 7 versions
, in arch rolling

💖 SRC/ssptrs.f 💖

okay so this page is from the Library Functions Manual, and it's giving major “I solve packed symmetric systems and I know it” energy. No cap, bestie 🫶

🌸 NAME 🌸

SRC/ssptrs.f — that's the file, and the main character here is SSPTRS 💅

✨ SYNOPSIS ✨

🌈 Functions/Subroutines 🌈

subroutine ssptrs (uplo, n, nrhs, ap, ipiv, b, ldb, info)
           SSPTRS

🛠️ Function/Subroutine Documentation 🛠️

🔥 subroutine ssptrs 🔥

subroutine ssptrs (character uplo, integer n, integer nrhs, real, dimension(
    * ) ap, integer, dimension( * ) ipiv, real, dimension( ldb, * ) b,
    integer ldb, integer info)

💅 SSPTRS 💅

🎯 Purpose 🎯

SSPTRS solves a system of linear equations A*X = B with a real symmetric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by SSPTRF. Literally iconic linear algebra behavior ✨

🧚 Parameters 🧚

  • UPLO — UPLO is CHARACTER*1. It specifies whether the details of the factorization are stored as an upper or lower triangular matrix, bestie:
    • = '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. slay 🌟
  • 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 REAL 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 SSPTRF, stored as a packed triangular matrix. it's giving packed and productive 🎀
  • IPIV — IPIV is INTEGER array, dimension (N). Details of the interchanges and the block structure of D as determined by SSPTRF.
  • B — B is REAL array, dimension (LDB,NRHS). On entry, the right hand side matrix B. On exit, the solution matrix X. glow-up complete 💖
  • 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 ssptrs.f.

🫶 Author 🫶

Generated automatically by Doxygen for LAPACK from the source code.

source/version check: LAPACK Version 3.12.0, page SRC/ssptrs.f(3) — the footer doesn't hand us a date, so that's the whole tea 🍓💖👑

📦 where this page comes from