APPROXIMATION OF 2d x 2d MATRICES USING TENSOR DECOMPOSITION

被引:132
|
作者
Oseledets, I. V. [1 ]
机构
[1] Russian Acad Sci, Inst Numer Math, Moscow 119991, Russia
关键词
tensors; TT-format; logarithmic; complexity; KRONECKER-PRODUCT APPROXIMATION; MULTIDIMENSIONAL NONLOCAL OPERATORS; RANK; COMPUTATION;
D O I
10.1137/090757861
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A new method for structured representation of matrices and vectors is presented. The method is based on the representation of a matrix as a d-dimensional tensor and applying the TT-decomposition proposed recently. It turned out that for many important cases the number of parameters to represent an n x n matrix falls down to O(log(alpha) n), giving a logarithmic storage. It is shown that this format can be used not only for storage reduction, but also for linear algebra operations. Possible applications include differential and integral equations, and data and image compression.
引用
收藏
页码:2130 / 2145
页数:16
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