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- W2950602236 abstract "Motivated by applications in storage systems and property testing, we study data stream algorithms for local testing and tolerant testing of codes. Ideally, we would like to know whether there exist asymptotically good codes that can be local/tolerant tested with one-pass, poly-log space data stream algorithms. We show that for the error detection problem (and hence, the local testing problem), there exists a one-pass, log-space data stream algorithm for a broad class of asymptotically good codes, including the Reed-Solomon (RS) code and expander codes. In our technically more involved result, we give a one-pass, $O(elog^2{n})$-space algorithm for RS (and related) codes with dimension $k$ and block length $n$ that can distinguish between the cases when the Hamming distance between the received word and the code is at most $e$ and at least $acdot e$ for some absolute constant $a>1$. For RS codes with random errors, we can obtain $ele O(n/k)$. For folded RS codes, we obtain similar results for worst-case errors as long as $ele (n/k)^{1-eps}$ for any constant $eps>0$. These results follow by reducing the tolerant testing problem to the error detection problem using results from group testing and the list decodability of the code. We also show that using our techniques, the space requirement and the upper bound of $ele O(n/k)$ cannot be improved by more than logarithmic factors." @default.
- W2950602236 created "2019-06-27" @default.
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- W2950602236 date "2010-04-26" @default.
- W2950602236 modified "2023-09-27" @default.
- W2950602236 title "Data Stream Algorithms for Codeword Testing" @default.
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