---
name: "blas2_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/blas2_grp"
---

# blas2\_grp(3)

Level 2 BLAS: matrix-vector ops

## NAME

blas2\_grp - Level 2 BLAS: matrix-vector ops

## SYNOPSIS

### Topics

**— full —**\
 **gemv:           general matrix-vector multiply**\
 **ger:            general matrix rank-1 update**\
 **{he,sy}mv:      Hermitian/symmetric matrix-vector multiply (\[cz\]symv in LAPACK)**\
 **{he,sy}r:       Hermitian/symmetric rank-1 update**\
 **{he,sy}r2:      Hermitian/symmetric rank-2 update**\
 **trmv:           triangular matrix-vector multiply**\
 **trsv:           triangular matrix-vector solve**\
 **— packed —**\
 **{hp,sp}mv:      Hermitian/symmetric matrix-vector multiply**\
 **{hp,sp}r:       Hermitian/symmetric rank-1 update**\
 **{hp,sp}r2:      Hermitian/symmetric rank-2 update**\
 **tpmv:           triangular matrix-vector multiply**\
 **tpsv:           triangular matrix-vector solve**\
 **— banded —**\
 **gbmv:           general matrix-vector multiply**\
 **{hb,sb}mv:      Hermitian/symmetric matrix-vector multiply**\
 **tbmv:           triangular matrix-vector multiply**\
 **tbsv:           triangular matrix-vector solve**\

## Detailed Description

## Author

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