ベルヌーイ試行
In information theory, the binary entropy function, denoted formula_1 or formula_2, is defined as the entropy of a Bernoulli process with probability formula_3 of one of two values. It is a special case of formula_4, the entropy function. Mathematically, the Bernoulli trial is modelled as a random variable formula_5 that can take on only two values: 0 and 1, which are mutually exclusive and exhaustive.