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Probability Function/p.f./Support. If a random variable X has a discrete distribution,
the probability function (abbreviated p.f.) of X is defined as the function f such that
for every real number x,
f (x) = Pr(X = x).
The closure of the set {x : f (x)>0} is called the support of (the distribution of) X.
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Definition3.1.4
Probability Function/p.f./Support. If a random variable X has a discrete distribution,
the probability function (abbreviated p.f.) of X is defined as the function f such that
for every real number x,
f (x) = Pr(X = x).
The closure of the set {x : f (x)>0} is called the support of (the distribution of) X.
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