libboost-graph1.71-dev 1.71.0-6ubuntu12 (ppc64el binary) in ubuntu impish

 This package forms part of the Boost C++ Libraries collection.
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 Graphs are mathematical abstractions that are useful for solving
 many types of problems in computer science. Consequently, these
 abstractions must also be represented in computer programs. A
 standardized generic interface for traversing graphs is of utmost
 importance to encourage reuse of graph algorithms and data structures.