Article
Summary:
The basis number of a graph $G$ is defined by Schmeichel to be the least integer $h$ such that $G$ has an $h$-fold basis for its cycle space. MacLane showed that a graph is planar if and only if its basis number is $\le 2$. Schmeichel proved that the basis number of the complete graph $K_n$ is at most $3$. We generalize the result of Schmeichel by showing that the basis number of the $d$-th power of $K_n$ is at most $2d+1$.
References:
[1] A. A. Ali and Salar Y. Alsardary: On the basis number of a graph. Dirasat 14 (1987), 43–51.
[2] A. A. Ali:
The basis number of the join of graphs. Arab J. Math. 10 (1989), 21–33.
Zbl 0806.05043
[3] A. A. Ali:
The basis number of complete multipartite graphs. Ars Combin. 28 (1989), 41–49.
MR 1039129 |
Zbl 0728.05058
[4] A. A. Ali:
The basis number of the direct products of paths and cycles. Ars Combin. 27 (1989), 155–164.
MR 0989461
[5] A. A. Ali and G. T. Marougi:
The basis number of the cartesian product of some graphs. J. Indian Math. Soc. (N.S.) 58 (1992), 123–134.
MR 1207033
[6] Salar Y. Alsardary and A. A. Ali:
The basis number of some special non-planar graphs. Czechoslovak Math. J (to appear).
MR 1983447
[8] J. A. Bondy and S. R. Murty:
Graph Theory with Applications. Amer. Elsevier, New York, 1976.
MR 0411988
[9] S. MacLane:
A combinatorial condition for planar graphs. Fund. Math. 28 (1937), 22–32.
Zbl 0015.37501