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oo n = - "JL(x) log 2 JL(x) =H2(JL) = -H(JL). 1 of Csiszar and Korner (1981); cf. 1 in Chapter 15. 40 CHAPTER 3 An alternative coding scheme leading to a similar result is block coding with small error probability. Ln(cp of =f:. id) ~a. J,n, a) = inf {l : 3 n-block code of length l at level a} be the minimal length of a binary n-block code with error level a. The following result then gives another justification of entropy.

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