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Please use this identifier to cite or link to this item:
http://hdl.handle.net/11154/2226
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| Title: | Retarded regular graphs are regular or semiregular |
| Authors: | De La Pena, JA
Gutman, I
Rada, J |
| Issue Date: | 2008 |
| Abstract: | A graph G is said to be retarded regular if there is a positive integral number s such that the number of walks of length s starting at vertices of G is a constant function. Regular and semiregular graphs are retarded regular with s=1 and s <= 2, respectively. We prove that any retarded regular connected graph is either regular or semiregular. |
| URI: | http://hdl.handle.net/11154/2226 |
| ISSN: | 0308-1087 |
| Appears in Collections: | Ciencias
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