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A remark on preinvex functions

Published online by Cambridge University Press:  17 April 2009

Jianwen Peng  and
Xianjun Long
Jianwen Peng
Affiliation:
College of Mathematics and Computer Science, Chongqing Normal University, Chongqing 400047, Peoples Republic of China, e-mail: [email protected] of Mathematics, Inner Mongolia University, Hohhot 010021, Inner Mongolia, Peoples Republic of China
Xianjun Long
Affiliation:
College of Mathematics and Compute Science, Chongqing Normal University, Chongqing 400047, Peoples Republic of China
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In this paper, we show that the ratio of preinvex functions is invex. Hence, we give a positive answer to the open question which was proposed in a paper of Yang, Yang and Teo in (2003).

Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 70 , Issue 3 , December 2004 , pp. 397 - 400
Copyright
Copyright © Australian Mathematical Society 2004

References

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