---
name: "geqr_comp_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/geqr_comp_grp"
---

# geqr\_comp\_grp(3)

QR

## NAME

geqr\_comp\_grp - QR

## SYNOPSIS

### Topics

**— flexible —**\
 **geqr:           QR factor, flexible**\
 **gemqr:          multiply by Q from geqr**\
 **— classic —**\
 **geqrf:          QR factor**\
 **geqr2:          QR factor, level 2**\
 **{un,or}gqr:     generate explicit Q from geqrf**\
 **{un,or}g2r:     generate explicit Q from geqrf, level 2**\
 **{un,or}mqr:     multiply by Q from geqrf**\
 **{un,or}m2r:     multiply by Q from geqrf, level 2**\
 **— with T —**\
 **geqrt:          QR factor, with T**\
 **geqrt2:         QR factor, with T, level 2**\
 **geqrt3:         QR factor, with T, recursive panel**\
 **gemqrt:         multiply by Q from geqrt**\
 **— positive —**\
 **geqrfp:         QR factor, diag( R ) ≥ 0**\
 **geqr2p:         QR factor, diag( R ) ≥ 0, level 2**\

## Detailed Description

## Author

Generated automatically by Doxygen for LAPACK from the source code.