SRC/clauu2.f(3)

💖 NAME 💖

SRC/clauu2.f — yep, that's the name, and this is the Library Functions Manual page for it. No cap, the whole NAME section is just the file path. 💅

✨ SYNOPSIS ✨

🫶 Functions/Subroutines 🫶

• subroutine clauu2 (uplo, n, a, lda, info) — CLAUU2 computes the product UUH or LHL, where U and L are upper or lower triangular matrices (unblocked algorithm). Iconic.

🎀 Function/Subroutine Documentation 🎀

Here's the full signature, bestie — copy it exactly, no autocorrect:

subroutine clauu2 (character uplo, integer n, complex, dimension( lda, * ) a, integer lda, integer info)

CLAUU2 computes the product UUH or LHL, where U and L are upper or lower triangular matrices (unblocked algorithm). 🦋

💅 Purpose 💅

Okay so bestie, CLAUU2 computes the product U * U**H or L**H * L, where the triangular factor U or L is stored in the upper or lower triangular part of the array A.

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 unblocked form of the algorithm, calling Level 2 BLAS. Lowkey fancy, highkey unblocked. ✨

🌸 Parameters 🌸

• UPLO — UPLO is CHARACTER*1. It 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. Zero is allowed, bestie.
• A — A is COMPLEX 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**H; if UPLO = 'L', the lower triangle of A is overwritten with the lower triangle of the product L**H * L. It literally overwrites, so don't expect the old factor to stay.
• LDA — LDA is INTEGER. The leading dimension of the array A. LDA >= max(1,N). Respect the leading dimension, fr fr.
• INFO — INFO is INTEGER:
  • = 0: successful exit
  • < 0: if INFO = -k, the k-th argument had an illegal value

Vibe check on those parameters: passed. 🫶

👑 Author 👑

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

Definition at line 101 of file clauu2.f. Line 101, for the record. 📌

🤖 Author 🤖

Generated automatically by Doxygen for LAPACK from the source code. Beep boop, the robots wrote this bit. 🤖✨

---

That's the whole page, bestie 💖 — signed off by LAPACK, Version 3.12.0, from SRC/clauu2.f(3) — no date listed in the footer, so that's the cute sign-off. Periodt. 💅