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Permanenten und Entropie

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Angenommen M = (m ij ) ist eine reelle (n × n)-Matrix. Vergessen wir in der üblichen Darstellung der Determinante die Vorzeichen der Summanden, so erhalten wir die Permanente per M,

$$\mathop{\mathrm{per}} M = \sum\limits_{\sigma} m_{1\sigma (1)}m_{2\sigma(2)} \cdots m_{n\sigma(n)},$$

wobei σ alle Permutationen von {1, 2, …, n} durchläuft.

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Correspondence to Martin Aigner .

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Aigner, M., Ziegler, G.M. (2015). Permanenten und Entropie. In: Das BUCH der Beweise. Springer Spektrum, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44457-3_37

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