nauty-planarg(1)
NAME
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
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