Discriminating codes in bipartite graphs: bounds, extremal cardinalities, complexity
Discriminating codes in bipartite graphs: bounds, extremal cardinalities, complexity
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二分图中的判别代码:界限、极值基数、复杂性
DOI:
10.3934/amc.2008.2.403
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
A. Lobstein
中科院分区:
文献类型:
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作者:
Emmanuel Charbit;I. Charon;G. Cohen;O. Hudry;A. Lobstein
Consider an undirected bipartite graph $G=(V=I\cup A,E)$, with no edge inside $I$ nor $A$. For any vertex $v\in V$, let $N(v)$ be the set of neighbours of $v$. A code $C \subseteq A$ is said to be discriminating if all the sets $N(i) \cap C$, $i \in I$, are nonempty and distinct. We study some properties of discriminating codes. In particular, we give bounds on the minimum size of these codes, investigate graphs where minimal discriminating codes have size close to the upper bound, or give the exact minimum size in particular graphs; we also give an NP-completeness result.