Long cycles in certain graphs of large degree
Let G be a connected graph of order n and X={x∈V:d(x)≥n/2}. Suppose |X|≥3 and G satisfies the modified Fan's condition. We show that the vertices of the block B of G containing X form a cycle. This generalizes a result of Fan. We also give an efficient algorithm to obtain such a cycle. The co...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2000-01-01
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| Series: | International Journal of Mathematics and Mathematical Sciences |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S0161171200003653 |
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| Summary: | Let G be a connected graph of order n and
X={x∈V:d(x)≥n/2}. Suppose
|X|≥3 and G satisfies the
modified Fan's condition. We show that the vertices of the block
B of G containing X form a cycle. This generalizes a result
of Fan. We also give an efficient algorithm to obtain such a
cycle. The complexity of this algorithm is O(n2). In case G is 2-connected, the condition |X|≥3 can be removed and G is hamiltonian. |
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| ISSN: | 0161-1712 1687-0425 |