{ "id": "1903.09725", "version": "v1", "published": "2019-03-22T22:27:38.000Z", "updated": "2019-03-22T22:27:38.000Z", "title": "Large homogeneous subgraphs in bipartite graphs with forbidden induced subgraphs", "authors": [ "Maria Axenovich", "Casey Tompkins", "Lea Weber" ], "categories": [ "math.CO" ], "abstract": "For a bipartite graph G, let h(G) be the largest t such that either G or the bipartite complement of G contain K_{t,t}. For a class F of graphs, let h(F)= min {h(G): G\\in F}. We say that a bipartite graph H is strongly acyclic if neither H nor its bipartite complement contain a cycle. By Forb(n, H) we denote a set of bipartite graphs with parts of sizes n each, that do not contain H as an induced bipartite subgraph respecting the sides. One can easily show that h(Forb(n,H))= O(n^{1-s}) for a positive s if H is not strongly acyclic. Here, we prove that h(Forb(n, H)) is linear in n for all strongly acyclic graphs except for four graphs.", "revisions": [ { "version": "v1", "updated": "2019-03-22T22:27:38.000Z" } ], "analyses": { "keywords": [ "bipartite graph", "forbidden induced subgraphs", "large homogeneous subgraphs", "bipartite complement contain", "induced bipartite subgraph" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }