Results on F -continuous graphs

Anna Draganova

Czechoslovak Mathematical Journal (2009)

  • Volume: 59, Issue: 1, page 51-60
  • ISSN: 0011-4642

Abstract

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For any nontrivial connected graph F and any graph G , the F -degree of a vertex v in G is the number of copies of F in G containing v . G is called F -continuous if and only if the F -degrees of any two adjacent vertices in G differ by at most 1; G is F -regular if the F -degrees of all vertices in G are the same. This paper classifies all P 4 -continuous graphs with girth greater than 3. We show that for any nontrivial connected graph F other than the star K 1 , k , k 1 , there exists a regular graph that is not F -continuous. If F is 2-connected, then there exists a regular F -continuous graph that is not F -regular.

How to cite

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Draganova, Anna. "Results on $F$-continuous graphs." Czechoslovak Mathematical Journal 59.1 (2009): 51-60. <http://eudml.org/doc/37907>.

@article{Draganova2009,
abstract = {For any nontrivial connected graph $F$ and any graph $G$, the $F$-degree of a vertex $v$ in $G$ is the number of copies of $F$ in $G$ containing $v$. $G$ is called $F$-continuous if and only if the $F$-degrees of any two adjacent vertices in $G$ differ by at most 1; $G$ is $F$-regular if the $F$-degrees of all vertices in $G$ are the same. This paper classifies all $P_4$-continuous graphs with girth greater than 3. We show that for any nontrivial connected graph $F$ other than the star $K_\{1,k\}$, $k \ge 1$, there exists a regular graph that is not $F$-continuous. If $F$ is 2-connected, then there exists a regular $F$-continuous graph that is not $F$-regular.},
author = {Draganova, Anna},
journal = {Czechoslovak Mathematical Journal},
keywords = {continuous; $F$-continuous; $F$-regular; regular graph; continuous graphs; -continuous graphs; -regular graphs; regular graphs},
language = {eng},
number = {1},
pages = {51-60},
publisher = {Institute of Mathematics, Academy of Sciences of the Czech Republic},
title = {Results on $F$-continuous graphs},
url = {http://eudml.org/doc/37907},
volume = {59},
year = {2009},
}

TY - JOUR
AU - Draganova, Anna
TI - Results on $F$-continuous graphs
JO - Czechoslovak Mathematical Journal
PY - 2009
PB - Institute of Mathematics, Academy of Sciences of the Czech Republic
VL - 59
IS - 1
SP - 51
EP - 60
AB - For any nontrivial connected graph $F$ and any graph $G$, the $F$-degree of a vertex $v$ in $G$ is the number of copies of $F$ in $G$ containing $v$. $G$ is called $F$-continuous if and only if the $F$-degrees of any two adjacent vertices in $G$ differ by at most 1; $G$ is $F$-regular if the $F$-degrees of all vertices in $G$ are the same. This paper classifies all $P_4$-continuous graphs with girth greater than 3. We show that for any nontrivial connected graph $F$ other than the star $K_{1,k}$, $k \ge 1$, there exists a regular graph that is not $F$-continuous. If $F$ is 2-connected, then there exists a regular $F$-continuous graph that is not $F$-regular.
LA - eng
KW - continuous; $F$-continuous; $F$-regular; regular graph; continuous graphs; -continuous graphs; -regular graphs; regular graphs
UR - http://eudml.org/doc/37907
ER -

References

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  1. Chartrand, G., Eroh, L., Schultz, M., Zhang, P., An introduction to analytic graph theory, Util. Math. 59 (2001), 31-55. (2001) Zbl0989.05035MR1832600
  2. Chartrand, G., Holbert, K. S., Oellermann, O. R., Swart, H. C., F -Degrees in graphs, Ars Comb. 24 (1987), 133-148. (1987) Zbl0643.05055MR0917968
  3. Chartrand, G., Jarrett, E., Saba, F., Salehi, E., Zhang, P., 10.1023/A:1013751031651, Czech. Math. J. 51 (2001), 351-361. (2001) Zbl0977.05042MR1844315DOI10.1023/A:1013751031651
  4. Erdös, P., Sachs, H., Reguläre Graphen gegebener Taillenweite mit minimaler Knotenzahl, Wiss Z. Martin-Luther-Univ. Halle-Wittenberg, Math.-Naturwiss. Reihe 12 (1963), 251-258 . (1963) MR0165515
  5. Gimbel, J., Zhang, P., Degree-continuous graphs, Czech. Math. J. 51 (2001), 163-171. (2001) Zbl1079.05504MR1814641

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