SRC/slauum.f(3)

📦
version 3.12.1 · 4 versions
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✨ NAME ✨

SRC/slauum.f — okay bestie, this is the page, straight out of the Library Functions Manual, and it's all about the slauum subroutine. 💅

🦋 SYNOPSIS 🦋

Functions/Subroutines

  • subroutine slauum (uplo, n, a, lda, info) — SLAUUM computes the product UUH or LHL, where U and L are upper or lower triangular matrices (blocked algorithm).

💖 Function/Subroutine Documentation 💖

subroutine slauum (character uplo, integer n, real, dimension( lda, * ) a,
    integer lda, integer info)

SLAUUM computes the product UUH or LHL, where U and L are upper or lower triangular matrices (blocked algorithm).

🌸 Purpose 🌸

Okay so here's the tea, bestie: SLAUUM computes the product U * U**T or L**T * L, where the triangular factor U or L is stored in the upper or lower triangular part of the array A. No cap. ✨

  • If UPLO = 'U' or 'u', then the upper triangle of the result is stored, overwriting the factor U in A.
  • If UPLO = 'L' or 'l', then the lower triangle of the result is stored, overwriting the factor L in A.

This is the blocked form of the algorithm, calling Level 3 BLAS. 🔥

🎀 Parameters 🎀

  • UPLO — UPLO is CHARACTER*1. Specifies whether the triangular factor stored in the array A is upper or lower triangular:
    • = 'U': Upper triangular
    • = 'L': Lower triangular
  • N — N is INTEGER. The order of the triangular factor U or L. N >= 0.
  • A — A is REAL array, dimension (LDA,N). On entry, the triangular factor U or L. On exit, if UPLO = 'U', the upper triangle of A is overwritten with the upper triangle of the product U * U**T; if UPLO = 'L', the lower triangle of A is overwritten with the lower triangle of the product L**T * L.
  • LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,N).
  • INFO — INFO is INTEGER.
    • = 0: successful exit
    • < 0: if INFO = -k, the k-th argument had an illegal value

👑 Author 👑

  • Univ. of Tennessee
  • Univ. of California Berkeley
  • Univ. of Colorado Denver
  • NAG Ltd.

Definition at line 101 of file slauum.f.

🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code.

That's the whole page, bestie — final footer energy: LAPACK Version 3.12.0, source SRC/slauum.f(3). Slay. 💖✨

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