For a complete bipartite graph to be decomposable into isomorphic cubes, certain conditions on the number of cube and bipartition vertices must hold. We prove these necessary conditions sufficient in some cases. For cubes of fixed dimension d (indeed for d-regular bipartite graphs in general) we sho
On the decomposition of n-cubes into isomorphic trees
β Scribed by John Frederick Fink
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 324 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
We prove that if T is any tree having n edges (n β₯ 1), then the nβcube Q~n~ can be decomposed into 2^nβ1^ edgeβdisjoint induced subgraphs, each of which is isomorphic to T. We use this statement to obtain two results concerning decompositions of Q~n~ into subgraphs isomorphic to members of a specified family of trees.
π SIMILAR VOLUMES
We study the Ha Β¨ggkvist conjecture which states that, for each tree T with n edges, there is an edge-partition of the complete bipartite graph K n;n into n isomorphic copies of T . We use the concept of bigraceful labelings, introduced in [7], which give rise to cyclic decompositions of K n;n . Whe
## Abstract A necessary condition for the decomposition of a tree __T__ into subtrees, each isomorphic to a tree from a given set of trees is presented. We also present a characterization of the set of trees for which the condition is sufficient. Many examples are given.
The N-cube is a graph with 2 N vertices and N 2 Ny1 edges. Suppose indepen- dent uniform random edge weights are assigned and let T be the spanning tree of minimal Ε½ . y 1 N Ο± y3 total weight. Then the weight of T is asymptotic to N 2 Γ i as N Βͺ Ο±. Asymp-is1 totics are also given for the local stru
Let Tp be any tree of order p and A ( T p ) stand for the maximum degree of the vertices of Tp. We prove the following theorem. "If A(Tp) 5 pi, where p > 2i, then Tp is i-placeable in Kp" is true if and only if i = 1, 2, and 3. 0 1996 John Wiley & Sons, Inc. Suppose G is a graph and V ( G ) , E ( G
## Abstract A short proof is given of the impossibility of decomposing the complete graph on __n__ vertices into __n__β2 or fewer complete bipartite graphs.