- underlying_graph() (in module sage.graphs.tutte_polynomial)
- union() (sage.graphs.generic_graph.GenericGraph method)
- unlabeled_edges() (sage.graphs.tutte_polynomial.Ear method)
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- unpickle_graph_backend() (in module sage.graphs.base.graph_backends)
- update_db() (sage.graphs.isgci.GraphClasses method)
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