nauty-planarg man page

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


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


For each input, write to output if planar.

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

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

Suppress auxiliary information

This program permits multiple edges and loops


September 2016 nauty 2.6.7 Nauty Manual