LEDA (.gw, .lgr) Graph Format
LEDA file format
LEDA is a text-based file format for storing a single directed or undirected graph.
The GraphTheory[ImportGraph] and GraphTheory[ExportGraph] commands can read from and write to this format.
Import a LEDA file encoding a directed graph.
digraph ≔ Import⁡example/digraph.lgr,base=datadir
digraph≔Graph 1: a directed graph with 11 vertices and 12 arc(s)
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