---
name: "laed_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/laed_comp_grp"
---

# laed\_comp\_grp(3)

tridiag divide and conquer (D&C) routines

## NAME

laed\_comp\_grp - tridiag divide and conquer (D&C) routines

## SYNOPSIS

### Topics

**laed0:          D&C step: top level solver**\
 **laed1:          D&C step: merge subproblems**\
 **laed2:          D&C step: deflation**\
 **laed3:          D&C step: secular equation**\
 **laed4:          D&C step: secular equation nonlinear solver**\
 **laed5:          D&C step: secular equation, 2x2**\
 **laed6:          D&C step: secular equation Newton step**\
 **lamrg:          permutation to merge 2 sorted lists**\
 **— eig value only or update Q —**\
 **laed7:          D&C step: merge subproblems**\
 **laed8:          D&C step: deflation**\
 **laed9:          D&C step: secular equation**\
 **laeda:          D&C step: z vector**\

## Detailed Description

## Author

Generated automatically by Doxygen for LAPACK from the source code.