SWI-Prolog -- neighbours/3

Availability::- use_module(library(ugraphs)).(can be autoloaded)

Unify Vertices with the list of neighbours of vertex Vertex in Graph. Example:

?- neighbours(4,[1-[3,5],2-[4],3-[],
                 4-[1,2,7,5],5-[],6-[],7-[],8-[]], NL).
NL = [1,2,7,5]