| 1. | Some necessary and sufficient conditions of finite groups 有限群的一些充要条件 |
| 2. | Some necessary and sufficient conditions on lucas sequences 序列的几个充要条件 |
| 3. | A necessary and sufficient condition on diffeomorphisms 关于微分同胚的一个充分必要条件 |
| 4. | The necessary and sufficient conditions of law of large numbers 大数定律的必要充分条件 |
| 5. | On the necessary and sufficient conditions of regular matrix 关于亚正定矩阵的几个判别条件 |
| 6. | Necessary and sufficient conditions for two positive stable matrices 论正规矩阵的充要条件 |
| 7. | The necessary and sufficient condition of series - compact sets in c spaces 空间中列紧集的一个充要条件 |
| 8. | On necessary and sufficient condition of invertible matrix in integral ring 整数环上矩阵可逆的充要条件 |
| 9. | The necessary and sufficient conditions for subpositive definite matrices 关于广义严格对角占优矩阵的注记 |
| 10. | Two necessary and sufficient condition for controllability of generalized systems 广义混沌同步系统的电路实验 |