This paper deals with the problem of finding the maximal density, +(M), of sets of integers in which differences given by a set M do not occur. The problem is solved for the case where the elements of M are in arithmetic progression. Besides finding lower bounds for most members of the general three
Permutations of the positive integers with specified differences
โ Scribed by Richard Stong
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 460 KB
- Volume
- 176
- Category
- Article
- ISSN
- 0012-365X
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โฆ Synopsis
In this paper, we show that given any finite set, D = {D 1, D2, ..., D.}, of positive integers, with gcd (D~, D 2 .... ,D.) = 1, there is a permutation of the positive integers such that the absolute value of the difference between any two consecutive values is in D. Further, it is possible to choose the permutation so that each element of D occurs infinitely often as a difference. This answers in the affirmative a conjecture of Slater and Velez (1977, 1979).
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