Remarks on Characteristic Functions

Remarks on Characteristic Functions
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特征函数备注

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发表时间:
1949
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通讯作者:
G. Pólya
G. Pólya
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作者:
G. Pólya

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引言这篇短文由两个部分组成,除了在这两个部分中我们讨论一维概率分布的特征函数外,它们几乎没有共同之处。在第一部分中,我们考虑了某种特殊类型的特征函数,其主要优点在于它很容易识别。在第二部分中,我们处理有限分布(包含在一定的有限区间内)和不同的分布(在一定的有限区间外重合)。该符号遵循Cram6r的著名道。分布函数用大写字母表示为F(x),相应的特征函数用相应的小写字母表示为asf(t)。因此
Introduction This short paper consists of two parts which have little in common except that in both we discuss characteristic functions of one-dimensional probability distributions. In the first part we consider characteristic functions of a certain special type whose principal merit lies in the fact that it is easily recognizable. In the second part we deal with finite distributions (contained in a certain finite interval) and with finitely different distributions (coinciding outside a certain finite interval). The notation follows that of Cram6r's well-known tract.' A distribution function is denoted by a capital letter, as F(x), and the corresponding characteristic function by the corresponding small letter, asf(t). Thus