Sciweavers

MLQ
2008
57views more  MLQ 2008»
13 years 10 months ago
Groupwise density cannot be much bigger than the unbounded number
We prove that g (the groupwise density number) is smaller or equal to b+, the successor of the minimal cardinality of an unbounded subset of . This is true even for the version of ...
Saharon Shelah
COMBINATORICS
2007
86views more  COMBINATORICS 2007»
13 years 10 months ago
Lower Bounds for the Football Pool Problem for 7 and 8 Matches
Let k3(n) denote the minimal cardinality of a ternary code of length n and covering radius one. In this paper we show k3(7) ≥ 156 and k3(8) ≥ 402 improving on the best previou...
Wolfgang Haas