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Table 1 Results on \((d_1, d_2)\)-sensitive bucketing functions of length-n sequence

From: Locality-sensitive bucketing functions for the edit distance

\((d_1, d_2)\)-sensitive

B

|B|

\(|f(\varvec{s})|\)

Ref.

(1, 2)

\(\{1,\ldots , |B|\}\)

\(n|\Sigma |^{n-1}\)⁎⁎

n⁎⁎

Theorem 1

(1, 3)

\(\mathcal {S}_n\)

\(|\Sigma |^n\)

\(|N_n^1(\varvec{s})|=(|\Sigma |-1)n+1\)

Lemma 6

(1, 3)

\(B_n^i\)

\(|\Sigma |^{n-1}\)

\({\left\{ \begin{array}{ll}1&{}\text {if } \varvec{s}\in B\\ n&{}\text {if } \varvec{s}\not \in B\end{array}\right. }\)

Lemma 911

(3, 5)

\(B_n^i\)

\(|\Sigma |^{n-1}\)

\(\le |N_n^2(\varvec{s})|\)

Theorem 2

\((r, 2r+1)\), \(r>1\)

\(B_n^i\)

\(|\Sigma |^{n-1}\)

\(\le |N_n^{r}(\varvec{s})|\)

Lemma 810

\((2r-1, 2r+1)\), \(r\ge 3\) odd

\(\mathcal {S}_n\)

\(|\Sigma |^n\)

\(|N_n^r(\varvec{s})|\)

Lemma 6

\((2r, 2r+1)\), \(r\ge 2\) even

\(\mathcal {S}_n\)

\(|\Sigma |^n\)

\(|N_n^r(\varvec{s})|\)

Lemma 6

  1. Entries with \(\le\) show the best known upper bounds. Entries marked with a single star cannot be reduced under the specific bucketing method. Entries marked with double stars cannot be reduced in general. In column B, we use \(B_n^i\) to refer to a constructed (1, 1)-guaranteed subset