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The min-entropy, in information theory, is the smallest of the Rényi family of entropies, corresponding to the most conservative way of measuring the unpredictability of a set of outcomes, as the negative logarithm of the probability of the most likely outcome. The various Rényi entropies are all equal for a uniform distribution, but measure the unpredictability of a nonuniform distribution in different ways. The min-entropy is never greater than the ordinary or Shannon entropy (which measures the average unpredictability of the outcomes) and that in turn is never greater than the Hartley or max-entropy, defined as the logarithm of the number of outcomes with nonzero probability.

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  • Min-entropie (cs)
  • Entropie min (fr)
  • Min-entropy (en)
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  • Min-entropie (značená obvykle ) je pojem z oboru teorie informace. Jedná se o nejkonzervativnější definici entropie z rodiny , tedy o nejkonzervativnější odhad neurčitosti možných výsledků. Různé Rényiho entropie jsou si rovny pro případ rovnoměrného rozdělení, ovšem liší pro jiná rozdělení pravděpodobnosti. Přitom platí, že min-entropie není nikdy větší než a Shannonova entropie není nikdy větší než . (cs)
  • En probabilités et en théorie de l'information, l'entropie min d'une variable aléatoire discrète X prenant n valeurs ou sorties possibles 1... n associées au probabilités p1... pn est : La base du logarithme est juste une constante d'échelle. Pour avoir un résultat en bits, il faut utiliser le logarithme en base 2. Ainsi, une distribution a une entropie min d'au moins b bits si aucune sortie n'a une probabilité plus grande que 2-b. La notation vient d'une famille paramétrée d'entropies appelée entropie de Rényi, * Portail des probabilités et de la statistique (fr)
  • The min-entropy, in information theory, is the smallest of the Rényi family of entropies, corresponding to the most conservative way of measuring the unpredictability of a set of outcomes, as the negative logarithm of the probability of the most likely outcome. The various Rényi entropies are all equal for a uniform distribution, but measure the unpredictability of a nonuniform distribution in different ways. The min-entropy is never greater than the ordinary or Shannon entropy (which measures the average unpredictability of the outcomes) and that in turn is never greater than the Hartley or max-entropy, defined as the logarithm of the number of outcomes with nonzero probability. (en)
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  • Min-entropie (značená obvykle ) je pojem z oboru teorie informace. Jedná se o nejkonzervativnější definici entropie z rodiny , tedy o nejkonzervativnější odhad neurčitosti možných výsledků. Různé Rényiho entropie jsou si rovny pro případ rovnoměrného rozdělení, ovšem liší pro jiná rozdělení pravděpodobnosti. Přitom platí, že min-entropie není nikdy větší než a Shannonova entropie není nikdy větší než . (cs)
  • The min-entropy, in information theory, is the smallest of the Rényi family of entropies, corresponding to the most conservative way of measuring the unpredictability of a set of outcomes, as the negative logarithm of the probability of the most likely outcome. The various Rényi entropies are all equal for a uniform distribution, but measure the unpredictability of a nonuniform distribution in different ways. The min-entropy is never greater than the ordinary or Shannon entropy (which measures the average unpredictability of the outcomes) and that in turn is never greater than the Hartley or max-entropy, defined as the logarithm of the number of outcomes with nonzero probability. As with the classical Shannon entropy and its quantum generalization, the von Neumann entropy, one can define a conditional version of min-entropy. The conditional quantum min-entropy is a one-shot, or conservative, analog of conditional quantum entropy. To interpret a conditional information measure, suppose Alice and Bob were to share a bipartite quantum state . Alice has access to system and Bob to system . The conditional entropy measures the average uncertainty Bob has about Alice's state upon sampling from his own system. The min-entropy can be interpreted as the distance of a state from a maximally entangled state. This concept is useful in quantum cryptography, in the context of privacy amplification (See for example ). (en)
  • En probabilités et en théorie de l'information, l'entropie min d'une variable aléatoire discrète X prenant n valeurs ou sorties possibles 1... n associées au probabilités p1... pn est : La base du logarithme est juste une constante d'échelle. Pour avoir un résultat en bits, il faut utiliser le logarithme en base 2. Ainsi, une distribution a une entropie min d'au moins b bits si aucune sortie n'a une probabilité plus grande que 2-b. L'entropie min est toujours inférieure ou égale à l'entropie de Shannon; avec égalité si toutes les valeurs de X sont équiprobables. L'entropie min est importante dans la théorie des . La notation vient d'une famille paramétrée d'entropies appelée entropie de Rényi, * Portail des probabilités et de la statistique (fr)
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