Lah numbers and Lindstr\"om's lemma
classification
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keywords
lemmalindstrnumberscombinatorialconcludeconesquencehenceforthinterpretation
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We provide a combinatorial interpretation of Lah numbers by means of planar networks. Henceforth, as a conesquence of Lindstr\"om's lemma, we conclude that the related Lah matrix possesses a remarkable property of total non-negativity.
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