Suppose that we partition each of A,B.and Cinto four2/2 matrices 4=(）a=()c-(8) so that we rewrite the equation C =A.B as (8)）-(A）() Equation (4.10)corresponds to the four equations C1=A11·B11+A2·B21 C12=A11·B12+A2·B22, 1个n阶方阵相乘的问题 C2I=A21·B11+A22·B21 可以分解为8个n/2阶方 C2 =A21·B12+A22·B22 阵相乘的子问题。1个n阶方阵相乘的问题 可以分解为8个n/2阶方 阵相乘的子问题