0 Entangled qubits, see Qubit Distance Entanglement/entangled, xii-xiv, xix, 362, 364, 431, between PDF, 69, 79 441, 445, 446, 449, 504, 506, 559-61, 637 definition, 79 Entropia, 50 Kullback-Leibler, 80, 81, 84, 85, 87-9, 143, 154, Entropy, xviii, xix, 97, 111, 123, 232, 304, 342, 343, 214, 437, 584, 661 431, 434, 435, 443, 475, 568-72 Distinct parsing, see Parsing algorithmic, xix, 96, 97, 110, 111 Distribution as measure of disorder, 285 exponential, see Probability Boltzmann's (-), 565-6 probability, see Probability complexity and (-), 111 uniform, see Probability concavity, 443-4, 451 Distributivity, 328 conditional (classical), 58, 69, 72, 77, 78, 85, 122, Diu, B., 635 Dixon algorithm, see Algorithm conditional (quantum), 441-2 DNA, 372 conditional relative (-), 81 Double-key encryption, see Encryption continuous or differential, see Entropy DV (digital video), 599 (differential) DVD (digital video disk), 603, 605-9 continuous source, 84 Dyadic (source, distribution), 149, 155 convergence with Kologorov complexity, 123-5 Dynamic coding, see Coding differential, 84, 85, 90, 265, 559-62 definition, 50, 52 Email, 596 effective code (-), 136 Eavesdropping, 556, 561, 562 infinite, 85, 86 EBCDIC (extended binary coded decimal joint (classical), 61, 69, 72, 77, 122, 238 interchange code), 130, 527 joint (quantum), 439-41 Ebit, 364, 367, 374-6 language, 57-63, 129 ECC, see Error-correction/correcting code maximum/maximizing, 63-7, 80, 88, 91, 94, 246, Eckert, A. K., 559, 560 252, 265, 578 Efficiency maximum (-) model (MEM), 67 alphabet use, 63 maximum (-) principle, 67 coding, see Coding relative (classical), 52, 69, 78-80, 85, 87-9, 584, Eigenspace, 339, 437 Eigenstate/eigenvector, 333, 338-40, 360, 390, 432, relative (quantum), 437 435, 437, 458 Shannon's, see Entropy Eigenvalue, 209, 333, 338-40, 437, 458 von Neumann (VN), XX, 333, 343, 431-7, 458, degenerate (-), 339 462, 478, 487, 488, 490, 491, 669 Eight-to-fourteen modulation (8/14) code, see Code Epistemic, 67 Einstein, xii-xiv theory of relativity, 367, 371