---
name: "blas1_grp"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/blas1_grp"
---

# blas1\_grp(3)

Level 1 BLAS: vector ops

## NAME

blas1\_grp - Level 1 BLAS: vector ops

## SYNOPSIS

### Topics

**asum:           sum \| real( x\_i ) \| + \| imag( x\_i ) \|**\
 **sum1:           sum \| x\_i \| (in LAPACK)**\
 **axpy:           y = ax + y**\
 **copy:           y = x**\
 **dot:            x^H x and x^T x**\
 **iamax:          argmax\_i \| real( x\_i ) \| + \| imag( x\_i ) \|**\
 **imax1:          argmax\_i \| x\_i \| (in LAPACK)**\
 **nrm2:           \|\| x \|\|\_2**\
 **scal:           x = alpha x**\
 **swap:           x \<=\> y**\
 **&mdash; Givens/Jacobi plane rotations &mdash;**\
 **rot:            apply plane rotation (\[cz\]rot in LAPACK)**\
 **rotg:           generate plane rotation (cf. lartg)**\
 **rotm:           apply modified (fast) plane rotation**\
 **rotmg:          generate modified (fast) plane rotation**\

## Detailed Description

## Author

Generated automatically by Doxygen for LAPACK from the source code.