DIMACS (.col, .col.b) Graph Format
DIMACS file format
DIMACS is a file format for storing a single undirected graph. It is has both text and binary variants.
The commands GraphTheory[ImportGraph] and GraphTheory[ExportGraph] can read from and write to the text-based version of this format.
The general-purpose commands Import and Export also support this format.
Import a DIMACS file encoding the Coxeter graph.
G ≔ Import⁡example/coxeter.col,base=datadir
G≔Graph 1: an undirected graph with 28 vertices and 42 edge(s)
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