Research output: Contribution to journal › Article › peer-review
This paper studies the quantity p(n,r), that is the minimal number of edges of an n-uniform hypergraph without panchromatic coloring (it means that every edge meets every color) in r colors. If [Formula presented] then all bounds have a type [Formula presented], where A1, A2 are some algebraic fractions. The main result is a new lower bound on p(n,r) when r is at least cn; we improve an upper bound on p(n,r) if n=o(r3∕2). Also we show that p(n,r) has upper and lower bounds depending only on n∕r when the ratio n∕r is small, which cannot be reached by the previous probabilistic machinery. Finally we construct an explicit example of a hypergraph without panchromatic coloring and with [Formula presented].
Original language | English |
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Pages (from-to) | 652-657 |
Number of pages | 6 |
Journal | Discrete Mathematics |
Volume | 341 |
Issue number | 3 |
DOIs | |
State | Published - 1 Mar 2018 |
ID: 35109964