| Article ID: | iaor20132063 |
| Volume: | 7 |
| Issue: | 3 |
| Start Page Number: | 617 |
| End Page Number: | 623 |
| Publication Date: | Mar 2013 |
| Journal: | Optimization Letters |
| Authors: | Lai Guoming, Liu Xiaoling, Yuan D |
In this note, we give new proofs for the well‐known results including characterizations of prequasi‐invex function and preinvex function under some assumptions.