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175
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ICALP
2007
Springer
16 years 24 days ago
2007
Springer
We present lower bounds on the space required to estimate the quantiles of a stream of numerical values. Quantile estimation is perhaps the most studied problem in the data stream ...
171
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ICALP
2007
Springer
16 years 24 days ago
2007
Springer
Abstract. The edit distance between two ordered rooted trees with vertex labels is the minimum cost of transforming one tree into the other by a sequence of elementary operations c...
145
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ICALP
2007
Springer
16 years 24 days ago
2007
Springer
Register allocation is NP-complete in general but can be solved in linear time for straight-line programs where each variable has at most one definition point if the bank of regis...
195
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ICALP
2007
Springer
16 years 24 days ago
2007
Springer
Abstract. Nested words are a restriction of the class of visibly pushdown languages that provide a natural model of runs of programs with recursive procedure calls. The usual conne...
137
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ICALP
2007
Springer
16 years 24 days ago
2007
Springer
Say that f : {0, 1}n → {0, 1} -approximates g : {0, 1}n → {0, 1} if the functions disagree on at most an fraction of points. This paper contains two results about approximatio...