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On the Variance of the Length of the Longest Common Subsequences in Random Words With an Omitted Letter
We investigate the variance of the length of the longest common subsequences
of two independent random words of size , where the letters of one word are
i.i.d. uniformly drawn from , while
the letters of the other word are i.i.d. drawn from , with probability to be
, and for all the other letters. The order of the
variance of this length is shown to be linear in .Comment: 19 page