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Lah numbers and Lindström's lemma

Published 13 Nov 2017 in math.CO | (1711.04547v1)

Abstract: 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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