---
name: "nauty-ancestorg"
section: "1"
platform: "linux"
package: "nauty"
version: "2.8.9+ds-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nauty-ancestorg"
---

# nauty-ancestorg(1)

removes a specified number of final vertices

## NAME

nauty-ancestorg - removes a specified number of final vertices

## SYNOPSIS

**ancestorg** \[*-q*\] \[*-g#:#\|-g#*\] \[*infile* \[*outfile*\]\]

## DESCRIPTION

-

  The g-th generation ancestor of a graph is the graph obtained by removing

-

  the final g vertices. The 0-th generation ancestor is the graph itself. For each input graph, write the ancestors whose generation is given by the g argument.  No zero-sized graphs are written. Output is always in graph6 format.

-

  The output file has a header if and only if the input file does.

- **-g**# **-g**#:#

  Specify a generation or range of generations (default: all)

- **-q**

  Suppress auxiliary information