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- W3204243755 abstract "Using geometric techniques like projection and dimensionality reduction, we show that there exists a randomized sub-linear time algorithm that can estimate the Hamming distance between two matrices. Consider two matrices ${bf A}$ and ${bf B}$ of size $n times n$ whose dimensions are known to the algorithm but the entries are not. The entries of the matrix are real numbers. The access to any matrix is through an oracle that computes the projection of a row (or a column) of the matrix on a vector in ${0,1}^n$. We call this query oracle to be an {sc Inner Product} oracle (shortened as {sc IP}). We show that our algorithm returns a $(1pm epsilon)$ approximation to ${bf D}_{bf M} ({bf A},{bf B})$ with high probability by making ${cal O}left(frac{n}{sqrt{{bf D}_{bf M} ({bf A},{bf B})}}mbox{poly}left(log n, frac{1}{epsilon}right)right)$ oracle queries, where ${bf D}_{bf M} ({bf A},{bf B})$ denotes the Hamming distance (the number of corresponding entries in which ${bf A}$ and ${bf B}$ differ) between two matrices ${bf A}$ and ${bf B}$ of size $n times n$. We also show a matching lower bound on the number of such {sc IP} queries needed. Though our main result is on estimating ${bf D}_{bf M} ({bf A},{bf B})$ using {sc IP}, we also compare our results with other query models." @default.
- W3204243755 created "2021-10-11" @default.
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- W3204243755 date "2021-07-06" @default.
- W3204243755 modified "2023-09-24" @default.
- W3204243755 title "Distance Estimation Between Unknown Matrices Using Sublinear Projections on Hamming Cube" @default.
- W3204243755 hasPublicationYear "2021" @default.
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