---
name: "gecs_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/gecs_comp_grp"
---

# gecs\_comp\_grp(3)

Cosine-Sine (CS) decomposition

## NAME

gecs\_comp\_grp - Cosine-Sine (CS) decomposition

## SYNOPSIS

### Topics

**bbcsd:          ??**\
 **{un,or}csd:     ??**\
 **{un,or}csd2by1: ??**\
 **{un,or}bdb:     bidiagonalize partitioned unitary matrix, step in uncsd**\
 **{un,or}bdb1:    step in uncsd2by1**\
 **{un,or}bdb2:    step in uncsd2by1**\
 **{un,or}bdb3:    step in uncsd2by1**\
 **{un,or}bdb4:    step in uncsd2by1**\
 **{un,or}bdb5:    step in uncsd2by1**\
 **{un,or}bdb6:    step in uncsd2by1**\
 **lapmr:          permute rows**\
 **lapmt:          permute cols**\

## Detailed Description

## Author

Generated automatically by Doxygen for LAPACK from the source code.