Computer Science > Discrete Mathematics
[Submitted on 25 Mar 2014 (v1), last revised 22 May 2014 (this version, v3)]
Title:Languages of lossless seeds
View PDFAbstract:Several algorithms for similarity search employ seeding techniques to quickly discard very dissimilar regions. In this paper, we study theoretical properties of lossless seeds, i.e., spaced seeds having full sensitivity. We prove that lossless seeds coincide with languages of certain sofic subshifts, hence they can be recognized by finite automata. Moreover, we show that these subshifts are fully given by the number of allowed errors k and the seed margin l. We also show that for a fixed k, optimal seeds must asymptotically satisfy l ~ m^(k/(k+1)).
Submission history
From: EPTCS [view email] [via EPTCS proxy][v1] Tue, 25 Mar 2014 16:33:41 UTC (25 KB)
[v2] Tue, 6 May 2014 18:14:19 UTC (20 KB)
[v3] Thu, 22 May 2014 03:21:03 UTC (54 KB)
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