运筹学 Operations Research 11 12 In 22 2n 2 100 0 0 00 0 A 000 0 m+1 010 +201 001 0 0 0 m+n(00 100 00 1={12,…,m},2=m+1,m+2,…,m+m A是全单模阵. 2021/2/202021/2/20 11 运 筹 学 Operations Research                           + + + = 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 1 0 0 0 1 1 1 0 0 0 0 0 0 2 1 2 1 1 1 1 2 1 2 1 2 2 2 1 2                                                         m n m m m x x x x x x x x x A n n m m m n {1,2, , }, { 1, 2, , } I 1 =  m I 2 = m+ m+  m+ n A是全单模阵. ▌