---
name: "blas_top"
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/blas_top"
---

# blas\_top(3)

BLAS

## NAME

blas\_top - BLAS

## SYNOPSIS

### Topics

**Scalar operations**\
 **Level 1 BLAS: vector ops**\
 **Level 2 BLAS: matrix-vector ops**\
 **Level 3 BLAS: matrix-matrix ops**\

## Detailed Description

BLAS are defined by three papers: Basic linear algebra subprograms for {FORTRAN} usage, Lawson et al, 1979. An extended set of {FORTRAN} basic linear algebra subprograms, Dongarra et al, 1988. A set of level 3 basic linear algebra subprograms, Dongarra et al, 1990. Some BLAS-like routines (e.g., csymv, crot, csum1, icmax1) exist in LAPACK rather than the classic BLAS. These were extended by the Extra Precision BLAS (XBLAS, not documented here) https://www.netlib.org/xblas/

## Author

Generated automatically by Doxygen for LAPACK from the source code.