On graphs containing a given graph as center
On graphs containing a given graph as center
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在包含给定图作为中心的图上
DOI:
10.1002/jgt.3190050413
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发表时间:
1981
期刊:
影响因子:
--
通讯作者:
P. Slater
中科院分区:
文献类型:
--
作者:
F. Buckley;Zevi Miller;P. Slater
We examine the problem of embedding a graph H as the center of a supergraph G, and we consider what properties one can restrict G to have. Letting A(H) denote the smallest difference ∣V(G)∣ - ∣V(H)∣ over graphs G having center isomorphic to H it is demonstrated that A(H) ≤ 4 for all H, and for 0 ≤ i ≤ 4 we characterize the class of trees T with A(T) = i. for n ≥ 2 and any graph H, we demonstrate a graph G with point and edge connectivity equal to n, with chromatic number X(G) = n + X(H), and whose center is isomorphic to H. Finally, if ∣V(H)∣ ≥ 9 and k ≥ ∣V(H)∣ + 1, then for n sufficiently large (with n even when k is odd) we can construct a k-regular graph on n vertices whose center is isomorphic to H.