A pair (x,y) is incomparable iff not xRy and not xRy
get_incomparable_pairs(B)object of class igraph or a square
0-1 matrix of class Matrix or matrix
integer matrix with two columns (indices of incomparable elements, not that these are pairs, and not sets: you'll get (i,j) and (j,i))
See also get_independent_sets of how to generate
all maximal independent sets.
Other binary_relations: closure_total_fair;
closure_transitive;
de_transitive;
get_equivalence_classes;
get_independent_sets;
is_reflexive; is_total;
is_transitive; pord_weakdom;
rel_graph