| Full text | |
| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Auburn Univ, Dept Math & Stat, Auburn, AL 36830 - USA
[2] Univ Rhode Isl, Dept Math, 5 Lippitt Rd, Kingston, RI 02881 - USA
[3] Georgia State Univ, Dept Math & Stat, Atlanta, GA 30303 - USA
Total Affiliations: 3
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| Document type: | Journal article |
| Source: | COMBINATORICS PROBABILITY & COMPUTING; v. 28, n. 6, p. 840-870, NOV 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
Given two k-graphs (k-uniform hypergraphs) F and H, a perfect F-tiling (or F-factor) in H is a set of vertex-disjoint copies of F that together cover the vertex set of H. For all complete k-partite k-graphs K, Mycroft proved a minimum codegree condition that guarantees a K-factor in an n-vertex k-graph, which is tight up to an error term o(n). In this paper we improve the error term in Mycroft's result to a sublinear term that relates to the Turan number of K when the differences of the sizes of the vertex classes of K are co-prime. Furthermore, we find a construction which shows that our improved codegree condition is asymptotically tight in infinitely many cases, thus disproving a conjecture of Mycroft. Finally, we determine exact minimum codegree conditions for tiling K-(k)(1, . . . , 1, 2) and tiling loose cycles, thus generalizing the results of Czygrinow, DeBiasio and Nagle, and of Czygrinow, respectively. (AU) | |
| FAPESP's process: | 14/18641-5 - Hamilton cycles and tiling problems in hypergraphs |
| Grantee: | Jie Han |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 15/07869-8 - Perfect matchings and Tilings in hypergraphs |
| Grantee: | Jie Han |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |
| FAPESP's process: | 13/03447-6 - Combinatorial structures, optimization, and algorithms in theoretical Computer Science |
| Grantee: | Carlos Eduardo Ferreira |
| Support Opportunities: | Research Projects - Thematic Grants |