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4. X R1 is a set of random variable. The mean is E(X) and the covariance = cov(X) = E((X E(X))(X E(X))). Show that
4. X R1 is a set of random variable. The mean is E(X) and the covariance = cov(X) = E((X E(X))(X E(X))). Show that is semi-positive define. That is to say, Va = R", a a 0.
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Introduction to graph theory
Authors: Douglas B. West
2nd edition
131437372, 978-0131437371
