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→Definition of long-tailed distribution 长尾分布的定义
=== Definition of long-tailed distribution 长尾分布的定义 ===
=== Definition of long-tailed distribution 长尾分布的定义 ===
The distribution of a [[random variable]] ''X'' with [[cumulative distribution function|distribution function]] ''F'' is said to have a long right tail if for all ''t'' > 0,
The distribution of a [[random variable]] ''X'' with [[cumulative distribution function|distribution function]] ''F'' is said to have a long right tail if for all ''t'' > 0,
The distribution of a random variable X with distribution function F is said to have a long right tail[1] if for all t > 0,
The distribution of a random variable X with distribution function F is said to have a long right tail[1] if for all t > 0,
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or equivalently
or equivalently