It is well known that a graph G of orderp 2 3 is Hamilton-connected if d(u) +d(v) 2 p + 1 for each pair of nonadjacent vertices u and w. In this paper we consider connected graphs G of order at least 3 for which where N ( z ) denote the neighborhood of a vertex z. We prove that a graph G satisfying
Sets of Prime Numbers Satisfying a Divisibility Condition
✍ Scribed by Paul Erdős; Anthony B. Evans
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 270 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0022-314X
No coin nor oath required. For personal study only.
✦ Synopsis
We study sets P of k primes that satisfy the condition gcd(> A&> B, > P)=1 whenever A and B are disjoint non-empty subsets of P. It is known that such sets of primes exist for all positive integers k. It is of interest to know the asymptotic behavior of n k , the smallest natural number that is the product of k such primes. In this paper we derive asymptotic bounds for n k .
📜 SIMILAR VOLUMES
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We investigate the exceptional set E $ (X, h) associated with the asymptotic formula for the number of primes in short intervals; see Section 1 for the definition. We first obtain two results about the basic structure of this set, proving the inertia and decrease properties; see Theorem 1. Then we t
## Abstract Chvátal and Erdös showed that a __k__‐connected graph with independence number at most __k__ and order at least three is hamiltonian. In this paper, we show that a graph contains a 2‐factor with two components, i.e., the graph can be divided into two cycles if the graph is __k__(≥ 4)‐co