摘要
研究了一类函数成为拟凹函数的充分必要条件，讨论了拟凹函数与严格拟凹函数和强拟凹函数的关系．
In this paper, we introduce the concept of closed function, obtain two sufficient and necessary conditions that the closed function is a quasiconcave function, and study the relation between quasiconcave function, strictly quasiconcave function and strongly quasiconcave function.
出处
《大连海事大学学报》
CAS
CSCD
1996年第1期97-100,共4页
Journal of Dalian Maritime University
