Labeled graph-processing utilities

Author(s): Francisco Bueno.

Version: 1.11#222 (2004/5/24, 13:8:7 CEST)

Version of last change: 1.11#134 (2003/12/30, 23:45:39 CET)

See the comments for the ugraphs library.

Usage and interface (`lgraphs`)

Library usage: :- use_module(library(lgraphs)).
Exports:
- Predicates: vertices_edges_to_lgraph/3.
- Regular Types: lgraph/2.
Other modules used:
- System library modules: sort, sets.

REGTYPE: lgraph/2:

Usage: lgraph(Graph, Type)

PREDICATE: vertices_edges_to_lgraph/3:

vertices_edges_to_lgraph(Vertices0, Edges, Graph)

This one is a copy of the same procedure in library(wgraphs) except for the definition of min/3 (ah! - the polimorphism!).

It would only be needed if there are multi-edges, i.e., several edges between the same two vertices.