𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the existence of a rainbow 1-factor in 1-factorizations of K

✍ Scribed by S.I. El-Zanati; M.J. Plantholt; P.A. Sissokho; L.E. Spence


Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
85 KB
Volume
15
Category
Article
ISSN
1063-8539

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

Let ${\cal F}$ be a 1‐factorization of the complete uniform hypergraph ${\cal G}={K_{rn}^{(r)}}$ with $r \geq 2$ and $n\geq 3$. We show that there exists a 1‐factor of ${\cal G}$ whose edges belong to n different 1‐factors in ${\cal F}$. Such a 1‐factor is called a “rainbow” 1‐factor or an “orthogonal” 1‐factor. © 2007 Wiley Periodicals, Inc. J Combin Designs 15: 487–490, 2007


📜 SIMILAR VOLUMES


On the existence of rainbows in 1-factor
✍ David E. Woolbright; Hung-Lin FU 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 745 KB

A 1-factor of a graph G = (V, E) is a collection of disjoint edges which contain all the vertices of V . Given a 2n -1 edge coloring of K2n, n ≥ 3, we prove there exists a 1-factor of K2n whose edges have distinct colors. Such a 1-factor is called a ''Rainbow.''

Toughness and the existence of k-factors
✍ Hikoe Enomoto; Bill Jackson; P. Katerinis; Akira Saito 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 317 KB 👁 1 views
Some sufficient conditions for the exist
✍ Ladislav Nebeský 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 208 KB 👁 1 views

## Abstract The following theorem is proved: Let __G__ be a graph of even order. Assume that there exists a connected spanning subgraph __F__ of __G__ such that for every set __U__ of four vertices in __G__, if the subgraph of __F__ induced by __U__ is a star, then the subgraph of __G__ induced by

A degree condition for the existence of
✍ Tsuyoshi Nishimura 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 358 KB 👁 1 views

## Abstract Let __k__ be an integer such that ≦, and let __G__ be a connected graph of order __n__ with ≦, __kn__ even, and minimum degree at least __k__. We prove that if __G__ satisfies max(deg(u), deg(v)) ≦ n/2 for each pair of nonadjacent vertices __u, v__ in __G__, then __G__ has a __k__‐facto

Edge-chromatic critical graphs and the e
✍ S. A. Choudum 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 300 KB 👁 1 views

## Abstract We give examples of edge‐chromatic critical graphs __G__ of the following types: (i) of even order and having no 1‐factor, and (ii) of odd order and having a vertex __v__ of minimum degree such that __G__ − __v__ has no 1‐factor. The first disproves a conjecture of S. Fiorini and R. J.

On the number of (r,r+1)- factors in an
✍ A. J. W. Hilton 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 113 KB 👁 1 views

## Abstract For integers __d__≥0, __s__≥0, a (__d, d__+__s__)‐__graph__ is a graph in which the degrees of all the vertices lie in the set {__d, d__+1, …, __d__+__s__}. For an integer __r__≥0, an (__r, r__+1)‐__factor__ of a graph __G__ is a spanning (__r, r__+1)‐subgraph of __G__. An (__r, r__+1)‐