According to an aspect of an embodiment, a high-speed operation method for directing a computer to process a coefficient matrix constituting simultaneous equations generated by modeling an analysis target into a mesh by using the finite element method and the boundary element method, said method includes obtaining two edges that are not on a same plane and that are the closest to each other from among edges defined in a mesh of a boundary modeled by the boundary element method, and ordering, in a vicinity of on-diagonal elements of the coefficient matrix, matrix elements in the coefficient matrix of simultaneous equations obtained for the two edges that are the closest to each other.
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