Lah numbers and Lindstr\"om's lemma
Combinatorics
2017-11-15 v1
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.
Cite
@article{arxiv.1711.04547,
title = {Lah numbers and Lindstr\"om's lemma},
author = {Ivica Martinjak and Riste Škrekovski},
journal= {arXiv preprint arXiv:1711.04547},
year = {2017}
}
Comments
4 pages, 1 figure