Back close

Improved Bounds for Uniform Hypergraphs without Property B

Publication Type : Journal Article

Publisher : Australasian Journal of Combinatorics

Source : Australasian Journal of Combinatorics

Campus : Coimbatore

School : School of Engineering

Year : 2020

Abstract : A hypergraph is said to be properly 2-colorable if there exists a 2-coloring of its vertices such that no hyperedge is monochromatic. On the other hand, a hypergraph is called non-2-colorable if there exists at least one monochromatic hyperedge in each of the possible 2-colorings of its vertex set. Let m(n) denote the minimum number of hyperedges in a non2-colorable n-uniform hypergraph. Establishing the lower and upper bounds on m(n) is a well-studied research direction over several decades. In this paper, we present new constructions for non-2-colorable uniform hypergraphs. These constructions improve the upper bounds for m(8), m(13), m(14), m(16) and m(17). We also improve the lower bound for m(5).

Cite this Research Publication : S. Aglave, V. A. Amarnath, S. Shannigrahi and S. Singh. Improved Bounds for Uniform Hypergraphs without Property B. Australasian Journal of Combinatorics 76 (1), 73-86, 2020.

Admissions Apply Now