摘要： Shannon entropy is one of the most important metrics in information theory. Entropy measures the uncertainty associated with a random variable, i.e.... 阅读全文

摘要： Definition Let be a sequence of (complex) Hilbert spaces and be the bounded operators from Hi to Hj. A map A on where is called a positive d... 阅读全文

摘要： Definition A Hilbert space H is a real or complex inner product space that is also a complete metric space with respect to the distance function... 阅读全文

摘要： In linear algebra, a symmetric n × n real matrix M is said to be positive definite if zTMz is positive for every non-zero columnvector z of n re... 阅读全文