nauty-planarg man page

nauty-planarg — test graphs for planarity and find embeddings or obstructions

Synopsis

planarg [-v] [-nVq] [-p|-u] [infile [outfile]]

Description

For each input, write to output if planar.

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

-v
Write non-planar graphs instead of planar graphs
-V
Write report on every input
-u
Don't write anything, just count
-p
Write in planar_code if planar (without -p, same format as input)
-k
Follow each non-planar output with an obstruction in sparse6 format (implies -v, incompatible with -p)
-n
Suppress checking of the result
-q

Suppress auxiliary information

This program permits multiple edges and loops

Info

September 2016 nauty 2.6.7 Nauty Manual