BLAS/SRC/cdotu.f(3)

📦
version 3.12.0 · 7 versions
, in centos-stream 10, fedora 43, fedora 44

✨ NAME ✨

okay bestie, welcome to BLAS/SRC/cdotu.f — this is the LAPACK girlies' little corner of the BLAS universe, and it's giving complex dot product realness. 💖

🌸 SYNOPSIS 🌸

Functions/Subroutines

  • complex function cdotu (n, cx, incx, cy, incy) — aka CDOTU, the main character of this whole page 👑

🎀 Function/Subroutine Documentation 🎀

complex function cdotu (integer n, complex, dimension(*) cx, integer incx, complex, dimension(*) cy, integer incy)

CDOTU

🦋 Purpose:

So like, CDOTU forms the dot product of two complex vectors, and the way that it does that is literally just:

CDOTU = X^T * Y

no cap, that's the whole vibe ✨

💅 Parameters

  • N — N is INTEGER, and it's the number of elements in input vector(s). bestie, this is how many lil guys we're multiplying together 🍓
  • CX — CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) ). yes the dimension formula is doing the absolute most but it's iconic and you WILL respect it 💜
  • INCX — INCX is INTEGER, the storage spacing between elements of CX. think of it as the stride, the walk, the lil skip between each element 🧚
  • CY — CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) ). same energy, different vector, we love to see it 🌈
  • INCY — INCY is INTEGER, the storage spacing between elements of CY. another stride, another slay 💅

👑 Author

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

like, the whole academic squad came together for this one 🫶

🔥 Further Details:

jack dongarra, linpack, 3/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

so we've got lore going back to 3/11/78 — historic behavior — and a lil glow-up on 12/3/93 where the array(1) declarations got switched up to array(*). character development fr fr 😭

heads up bestie: Definition at line 82 of file cdotu.f. — that's where the actual code lives, go look if you're nosy (I support it) 🙈

⭐ Author ⭐

Generated automatically by Doxygen for LAPACK from the source code. so nobody hand-wrote this, the robot did it, and honestly? it ate. 💀✨

Version 3.12.0 · Tue Nov 28 2023 12:08:41 · BLAS/SRC/cdotu.f(3)

okay that's the whole page bestie, thanks for coming to my ted talk, go multiply some complex vectors, ily, mwah 💖🎀🦋

📦 where this page comes from