tail event

Noun

Meaning

(probability) an event associated with a given infinite sequence



Y
=
{

y

k



|

k
≥

k

0


}


{\displaystyle Y=\{y_{k}|k\geq k_{0}\}}

that is determined by any subsequence of the form




Y

n


=
{

y

k



|

k
≥
n
}
,
n
≥

k

0




{\displaystyle Y_{n}=\{y_{k}|k\geq n\},n\geq k_{0}}

(a "tail" of that sequence)

a low-probability event

an event that initiates an activity

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