## Abstract Kotzig asked in 1979 what are necessary and sufficient conditions for a __d__‐regular simple graph to admit a decomposition into paths of length __d__ for odd __d__>3. For cubic graphs, the existence of a 1‐factor is both necessary and sufficient. Even more, each 1‐factor is extendable
Decompositions of regular bipartite graphs
✍ Scribed by Michael S. Jacobson; Miroslaw Truszczyński; Zsolt Tuza
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 692 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
✦ Synopsis
In this paper we discuss isomorphic decompositions of regular bipartite graphs into trees and forests.
We prove that: (1) there is a wide class of r-regular bipartite graphs that are decomposable into any tree of size r, (2) every r-regular bipartite graph decomposes into any double star of size r, and (3) every 4-regular bipartite graph decomposes into paths Pd.
📜 SIMILAR VOLUMES
In this article, we show that every simple r-regular graph G admits a balanced P 4 -decomposition if r ≡ 0(mod 3) and G has no cut-edge when r is odd. We also show that a connected 4-regular graph G admits a P 4 -decomposition if and only if |E(G)| ≡ 0(mod 3) by characterizing graphs of maximum degr
## Abstract A labeling of a graph __G__ is a bijection from __E__(__G__) to the set {1, 2,… |__E__(__G__)|}. A labeling is __antimagic__ if for any distinct vertices __u__ and __v__, the sum of the labels on edges incident to __u__ is different from the sum of the labels on edges incident to __v__.
Let denote a bipartite distance-regular graph with diameter D ≥ 4 and valency k ≥ 3. Let θ 0 > θ 1 > • • • > θ D denote the eigenvalues of and let E 0 , E 1 , . . . , E D denote the associated primitive idempotents. Fix s (1 ≤ s ≤ D -1) and abbreviate E := E s . We say E is a tail whenever the entry
## Abstract In this paper, it will be shown that the isomorphism classes of regular orientable embeddings of the complete bipartite graph __K__~__n,n__~ are in one‐to‐one correspondence with the permutations on __n__ elements satisfying a given criterion, and the isomorphism classes of them are com