Packing bipartite graphs with covers of complete bipartite graphs
Packing bipartite graphs with covers of complete bipartite graphs
复制标题
用完整二分图的覆盖来包装二分图
DOI:
10.1016/j.dam.2012.08.026
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发表时间:
2014
影响因子:
1.1
通讯作者:
Chalopin J
中科院分区:
文献类型:
--
作者:
Chalopin J
For a set S of graphs, a perfect S-packing (S-factor) of a graph G is a set of mutually vertex-disjoint subgraphs of G that each are isomorphic to a member of S and that together contain all vertices of G. If G allows a covering (locally bijective homomorphism) to a graph H, ie, a vertex mapping f: V G→ V H satisfying the property that f (u) f (v) belongs to E H whenever the edge u v belongs to E G such that for every u∈ V G the restriction of f to the neighborhood of u is bijective, then G is an H-cover. For some fixed H let S (H) consist of all connected H-covers. Let K k, ℓ be the complete bipartite graph with partition classes of size k and ℓ, respectively. For all fixed k, ℓ≥ 1, we determine the computational complexity of the problem that tests whether a given bipartite graph has a perfect S (K k, ℓ)-packing. Our technique is partially based on exploring a close relationship to pseudo-coverings. A pseudo-covering from a graph G to a graph H is a homomorphism from G to H that becomes a covering to H when restricted to a spanning subgraph of G. We settle the computational complexity of the problem that asks whether a graph allows a pseudo-covering to K k, ℓ for all fixed k, ℓ≥ 1.
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影响因子:
2.1
作者:
Jérémie Chalopin;D. Paulusma
通讯作者:
D. Paulusma
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
emie Chalopin;D. Paulusma
通讯作者:
D. Paulusma
影响因子:
1.1
作者:
J. Fiala;D. Paulusma
通讯作者:
D. Paulusma
DOI:
--
发表时间:
1991
期刊:
The Australasian Journal of Combinatorics
影响因子:
--
作者:
J. Abello;M. Fellows;J. Stillwell
通讯作者:
J. Stillwell
DOI:
--
发表时间:
1998
期刊:
Nordic Journal of Computing
影响因子:
--
作者:
Jan Kratochvíl;A. Proskurowski;J. A. Telle
通讯作者:
J. A. Telle