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TT-Toolbox (TT=Tensor Train) Version 2.2 TT(Tensor Train) format is an efficient way for low-parametric representation of high-dimensional tensors. The TT-Toolbox is a MATLAB implementation of basic operations with tensors in TT-format. It includes: * tt_tensor and tt_matrix classes for storing vectors and operators * Basic linear algebra subroutines (addition, matrix-by-vector product, elementwise multiplication and many others) using standard MATLAB syntax, linear complexity in the dimension, reshape function * Fast rounding procedure with a prescribed accuracy * Advanced approximation and solution techniques: * Approximate solution of linear systems and eigenvalue problems * Cross methods to approximate ``black-box'' tensors * Wavelet tensor train decomposition * Construction of basic operators and functions (Laplace operator, function of a TT-tensor) * Computation of maximal and minimal elements of a tensor * and several others New in Version 2.2 * Better documentation * Mixed QTT-Tucker format (qtt_tucker class) * reshape function for a TT-tensor/TT-matrix * dmrg_cross method for black-box tensor approximation * Convolution in QTT-format TT-Toolbox 2.2. can be downloaded from http://spring.inm.ras.ru/osel
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