i1 : union(chain 3, poset {{1,4},{4,5},{5,3}}) o1 = Poset{cache => CacheTable{} } GroundSet => {1, 2, 3, 4, 5} RelationMatrix => | 1 1 1 1 1 | | 0 1 1 0 0 | | 0 0 1 0 0 | | 0 0 1 1 1 | | 0 0 1 0 1 | Relations => {{1, 2}, {2, 3}, {1, 4}, {4, 5}, {5, 3}} o1 : Poset |