| 1 | Studied periodic function and its least positive period. | |
| 2 | Zhang proposed pseudo almost periodic function and pseudo almost periodic function sequence. | |
| 3 | The separability of asymptotically strongly periodic function space and asymptotically periodic sequence space are also discussed. | |
| 4 | This paper explores the two important properties of periodic function by an example. | |
| 5 | By using properties of scalar almost periodic function, properties of uniform almost periodic matrix function are discussed. |