The Rate of Convergence of the Mean Length of the Longest Common Subsequence
The Rate of Convergence of the Mean Length of the Longest Common Subsequence
复制标题
最长公共子序列平均长度的收敛率
DOI:
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发表时间:
1994
期刊:
影响因子:
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通讯作者:
K. S. Alexander
中科院分区:
文献类型:
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作者:
K. S. Alexander
Given two i.i.d. sequences of n letters from a finite alphabet, one can consider the length Ln of the longest sequence which is a subsequence of both the given sequences. It is known that ELn grows like yn for some y E [0, 1]. Here it is shown that yn ? ELn ? yn C(n log n)l/2 for an explicit numerical constant C which does not depend on the distribution of the letters. In simulations with n = 100,000, ELn/n can be determined from k such trials with 95% confidence to within 0.0055/ k, and the results here show that y can then be determined with 95% confidence to within 0.0225 + 0.0055/ k, for an arbitrary letter distribution.