{ "id": "1706.03092", "version": "v1", "published": "2017-06-09T18:57:40.000Z", "updated": "2017-06-09T18:57:40.000Z", "title": "Finding Balance: Split Graphs and Related Classes", "authors": [ "Karen L. Collins", "Ann N. Trenk" ], "comment": "15 pages", "categories": [ "math.CO" ], "abstract": "A graph is a split graph if its vertex set can be partitioned into a clique and a stable set. A split graph is unbalanced if there exist two such partitions that are distinct. Cheng, Collins and Trenk (2016), discovered the following interesting counting fact: unlabeled, unbalanced split graphs on $n$ vertices can be placed into a bijection with all unlabeled split graphs on $n-1$ or fewer vertices. In this paper we translate these concepts and the theorem to different combinatorial settings: minimal set covers, bipartite graphs with a distinguished block and posets of height one.", "revisions": [ { "version": "v1", "updated": "2017-06-09T18:57:40.000Z" } ], "analyses": { "subjects": [ "05C30", "05C17", "06A07" ], "keywords": [ "related classes", "finding balance", "minimal set covers", "unbalanced split graphs", "vertex set" ], "note": { "typesetting": "TeX", "pages": 15, "language": "en", "license": "arXiv", "status": "editable" } } }