Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/54
Title: | Ramseyan variations on symmetric subsequences |
Authors: | Verbitsky, Oleg |
Issue Date: | 13-Dec-2002 |
Publisher: | Луганский национальный университет им. Т. Шевченко |
Description: | A theorem of Dekking in the combinatorics of words implies that there exists an injective order-preserving transformation f : {0, 1, . . . , n} → {0, 1, . . . , 2n} with the restriction f(i + 1) ≤ f(i) + 2 such that for every 5-term arithmetic progression P its image f(P) is not an arithmetic progression. In this paper we consider symmetric sets in place of arithmetic progressions and prove lower and upper bounds for the maximum M = M(n) such that every f as above preserves the symmetry of at least one symmetric set S ⊆ {0, 1, . . . , n} with |S| ≥ M. |
URI: | http://hdl.handle.net/123456789/54 |
Appears in Collections: | Статті |
Files in This Item:
File | Description | Size | Format | |
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adm-n1-2003-11.pdf | 176.9 kB | Adobe PDF | View/Open |
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