Intersecting families of sets are typically trivial

被引:1
|
作者
Balogh, Jozsef [1 ]
Garcia, Ramon I. [2 ]
Li, Lina [3 ]
Wagner, Adam Zsolt [4 ]
机构
[1] Univ Illinois, Dept Math Sci, Champaign, IL 61801 USA
[2] Univ Illinois, Dept Math, Urbana, IL USA
[3] Univ Waterloo, Dept Combinator & Optimizat, Waterloo, ON, Canada
[4] Worcester Polytech Inst, Dept Math Sci, Worcester, MA USA
关键词
Extremal combinatorics; Intersecting family; Graph container method; INDEPENDENT SETS; THEOREMS; SYSTEMS;
D O I
10.1016/j.jctb.2023.09.002
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
A family of subsets of [n] is intersecting if every pair of its sets intersects. Determining the structure of large intersecting families is a central problem in extremal combinatorics. Frankl- Kupavskii and Balogh-Das-Liu-Sharifzadeh-Tran showed that for n >= 2k + c root k ln k, almost all k-uniform intersecting families are stars. Improving their result, we show that the same conclusion holds for n >= 2k + 100 ln k. Our proof uses, among others, the graph container method and the Das-Tran removal lemma.(c) 2023 Elsevier Inc. All rights reserved.
引用
收藏
页码:44 / 67
页数:24
相关论文
共 50 条
  • [21] REGULARLY INTERSECTING FAMILIES OF FINITE SETS
    FRANKL, P
    ROSENBERG, IG
    ARS COMBINATORIA, 1986, 22 : 97 - 105
  • [22] Intersecting two families of sets on the GPU
    Fort, Marta
    Antoni Sellares, J.
    Valladares, Nacho
    JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING, 2017, 104 : 167 - 178
  • [23] Non-trivial intersecting uniform sub-families of hereditary families
    Borg, Peter
    DISCRETE MATHEMATICS, 2013, 313 (17) : 1754 - 1761
  • [24] Non-trivial d-wise intersecting families
    O'Neill, Jason
    Verstraete, Jacques
    JOURNAL OF COMBINATORIAL THEORY SERIES A, 2021, 178
  • [25] NON-TRIVIAL r-WISE INTERSECTING FAMILIES
    Frankl, P.
    Wang, J.
    ACTA MATHEMATICA HUNGARICA, 2023, 169 (02) : 510 - 523
  • [26] Non-trivial t-intersecting separated families
    Frankl, Peter
    Liu, Erica L. L.
    Wang, Jian
    Yang, Zhe
    DISCRETE APPLIED MATHEMATICS, 2024, 342 : 124 - 137
  • [27] Non-trivial r-wise intersecting families
    P. Frankl
    J. Wang
    Acta Mathematica Hungarica, 2023, 169 : 510 - 523
  • [28] On r-Cross Intersecting Families of Sets
    Frankl, Peter
    Tokushige, Norihide
    COMBINATORICS PROBABILITY & COMPUTING, 2011, 20 (05): : 749 - 752
  • [30] Cross-intersecting families of labeled sets
    Zhang, Huajun
    ELECTRONIC JOURNAL OF COMBINATORICS, 2013, 20 (01):