On the queen domination problem
โ Scribed by Charles M. Grinstead; Bruce Hahne; David Van Stone
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 393 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
โฆ Synopsis
A configuration of queens on an m X m chessboard is said to dominate the board if every square either contains a queen or is attacked by a queen. The configuration is said to be non-attacking if no queen attacks another queen. Let f(m) and g(m) equal the minimum number of queens and the minimum number of non-attacking queens, respectively, needed to dominate an m x m chessboard. We prove that:
(1) f(m)sgm+O(l), and
(2) g(m) G $rn + O(1).
These are the best upper bounds known at the present time for these functions.
๐ SIMILAR VOLUMES
Heden, O., On the modular n-queen problem, Discrete Mathematics 102 (1992) 155-161. Let M(n) denote the maximum number of queens on a modular chessboard such that no two attack each other. We prove that if 4 or 6 divides n then M(n) c n -2 and if gcd(n, 24) = 8 then M(n) 2 n -2. We also show that M
Let i(G) (i(G), respectively) be the independent domination number (i.e. smallest cardinality of a maximal independent vertex subset) of the p-vertex graph G (the complement G of G, respectively). We prove limp~[max~ i(G)i(Cr)/p 2] = 1/16.
The vertices of the queem;' graph {~, are the squares of an n ร n chessboard and two squares are adjacent ifa queen placed on one covers the other. It is shown that the domination num;~'r of Q. is at most 31n/54 + O(1), that Q. possesses minimal dominating sets of cardina~tty 5n/2 -O(l) and that the