/home/abui...dznrm2.f90(3)

💖 NAME 💖

Okay bestie, welcome to the manpage for /home/abui...dznrm2.f90(3) — it lives in the Library Functions Manual and it is literally all about DZNRM2. The full source path is a whole journey: /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/BLAS/SRC/dznrm2.f90. Slay. ✨

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🌸 SYNOPSIS 🌸

🎀 Functions/Subroutines 🎀

• real(wp) function DZNRM2 (n, x, incx) — DZNRM2

real(wp) function DZNRM2 (n, x, incx)
           DZNRM2

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💅 Function/Subroutine Documentation 💅

real(wp) function DZNRM2 (integer n, complex(wp), dimension(*) x, integer
       incx)
       DZNRM2

⭐ Purpose ⭐

Bestie, DZNRM2 returns the euclidean norm of a vector via the function name, so that:

DZNRM2 := sqrt( x**H*x )

That's the vibe. 🫶

🦋 Parameters 🦋

💜 N

N is INTEGER; number of elements in input vector(s).

💜 X

X is COMPLEX*16 array, dimension (N); complex vector with N elements.

💜 INCX

INCX is INTEGER, storage spacing between elements of X.

• If INCX > 0, X(1+(i-1)*INCX) = x(i) for 1 <= i <= n
• If INCX < 0, X(1-(n-i)*INCX) = x(i) for 1 <= i <= n
• If INCX = 0, x isn't a vector so there is no need to call this subroutine. If you call it anyway, it will count x(1) in the vector norm N times.

👑 Author 👑

Edward Anderson, Lockheed Martin

📅 Date 📅

August 2016

🌈 Contributors 🌈

Weslley Pereira, University of Colorado Denver, USA

🔥 Further Details 🔥

• Anderson E. (2017) Algorithm 978: Safe Scaling in the Level 1 BLAS ACM Trans Math Softw 44:1--28 https://doi.org/10.1145/3061665
• Blue, James L. (1978) A Portable Fortran Program to Find the Euclidean Norm of a Vector ACM Trans Math Softw 4:15--23 https://doi.org/10.1145/355769.355771

Definition at line 89 of file dznrm2.f90.

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👑 Author (Doxygen note) 👑

Generated automatically by Doxygen for LAPACK from the source code.

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That's the whole page, bestie. Source/version: LAPACK Version 3.12.0. Footer path: /home/abui...dznrm2.f90(3). The Date section says August 2016. Mwah 💋