现值分布的单峰性与现值模型的扩展

Unimodality of Present Value Distribution and Extension to Present Value Models

介绍了(0)单峰性、α-单峰性、γ-单峰性的概念,证明了它们的等价形式,然后给出现值分布的数学描述,对现值分布模型进行扩展,并在一定条件下,证明现值分布渐近γ-单峰性.

The paper begins with introducing the concepts of （0） unimodality,α-unimodality, γ-unimodality and proves their equivalent expression forms, gives mathematical description on random present-value distribution , extends the random present-value model, and prove that its distribution is asymptotically γ-unimodality.