Provided by: nauty_2.4-2_amd64
planarg - For each input, write to output if planar.
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. -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