All reports by Author Zhao Song:

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TR18-103
| 30th April 2018
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Zhao Song, David Woodruff, Peilin Zhong#### Relative Error Tensor Low Rank Approximation

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TR14-127
| 11th October 2014
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Alexandros G. Dimakis, Anna Gal, Ankit Singh Rawat, Zhao Song#### Batch Codes through Dense Graphs without Short Cycles

Zhao Song, David Woodruff, Peilin Zhong

We consider relative error low rank approximation of tensors with respect to the Frobenius norm. Namely, given an order-$q$ tensor $A \in \mathbb{R}^{\prod_{i=1}^q n_i}$, output a rank-$k$ tensor $B$ for which $\|A-B\|_F^2 \leq (1+\epsilon) {\rm OPT}$, where ${\rm OPT} = \inf_{\textrm{rank-}k~A'} \|A-A'\|_F^2$. Despite much success on obtaining relative error low ... more >>>

Alexandros G. Dimakis, Anna Gal, Ankit Singh Rawat, Zhao Song

Consider a large database of $n$ data items that need to be stored using $m$ servers.

We study how to encode information so that a large number $k$ of read requests can be performed \textit{in parallel} while the rate remains constant (and ideally approaches one).

This problem is equivalent ...
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