Let (a,, . . . , a,, b,, . . . , b,) be the sequence of distinct positive integers such that ai + bi are distinct for i = 1, . . . , t, and different from ai and bj, 1 si s t. Denote by s(t) the minimum of the largest element of these sequences for fixed t. In this note we prove s(t) 2 [(15t -1)/71
The irregularity strength of tKp
✍ Scribed by Stanislav Jendroľ; Michal Tkáč
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 211 KB
- Volume
- 145
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
✦ Synopsis
Assign positive integer weights to the edges of a simple graph G (with no isolated edges and vertices) of order at least 3 in such a way that the graph becomes irregular, i.e. the weight sums at the vertices become pairwise distinct. The minimum of the largest weights assigned over all such irregular assignments on the union of t copies of the complete graph with p vertices, p >~ 3, is determined. A recent conjecture of Faudree et al. is disproved.
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