TENSOR DATA CALCULATION DEVICE, TENSOR DATA CALCULATION METHOD, AND PROGRAM

摘要

Provided is a tensor data calculation device which has a matrix product calculation processor, and decomposes N-th order (N: 2 or more integer) nonnegative tensor data into N factor matrixes by factorization, characterized by having: a factorization means for expressing an update formula of the factor matrix for optimizing a predetermined objective function value in a form including a matrix product of a first matrix acquired by developing remaining N-1 factor matrixes excluding the factor matrix by a Kronecker product and a second matrix defined by a tensor product of the nonnegative tensor data and the N factor matrixes, and calculating the update formula; and a matrix calculation means for calculating the matrix product included in the update formula by the matrix product calculation processor, and characterized in that the factorization means uses a calculation result of the matrix product calculated by the matrix calculation means to calculate the update formula.