单词	characteristic function
释义	characteristic function (probability) Given a random variable X, then its characteristic function is φX(t) = E(eitX), where E denotes the expectation. If the probability density function is fX:R → R, then note that , where denotes the Fourier transform. Characteristic functions have the merit of converging, which is not always the case for moment generating functions (see cauchy distribution).
随便看	error‐correcting escape speed e-science escribed circle essential singularity estimate estimation estimator Euclid Euclidean Algorithm Euclidean construction Euclidean distance Euclidean domain Euclidean geometry Euclidean group Euclidean norm Euclidean space Euclid numbers Euclid's postulates Eudoxus of Cnidus Euler angles Euler characteristic Euler force Eulerian graph Eulerian trail

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