Inverse Matrix Calculation Device and Inverse Matrix Calculation Processing Method

摘要

An embodiment inverse matrix calculation apparatus includes a processor that performs an elementary row operation, based on Gaussian elimination, on an augmented matrix for an input matrix with N rows and N columns, and a memory that stores an N-by-N matrix. The processor stores, each time normalization calculation is performed for an element in an (i+1)-th row and an (i+1)-th column of the augmented matrix, in the memory, an N-by-N matrix having, as an element in a first row and a first column, an element in a first row and an (i+2)-th column of the augmented matrix, repeats, based on the N-by-N matrix stored in the memory, normalization calculation for an element in an (i+2)-th row and the (i+2)-th column of the augmented matrix, and outputs the N-by-N matrix stored in the memory when calculation for first to N-th rows is ended, as an inverse matrix.