Yifei Li

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20112025

most citedA combinatorial proof of a symmetry for a refinement of the Narayana numbers

2 citations · 3 across the 3 of their papers we have counts for

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math.CO2022★ 2 cited

A combinatorial proof of a symmetry for a refinement of the Narayana numbers

Miklós Bóna, Stoyan Dimitrov, Gilbert Labelle +4

We establish a tantalizing symmetry of certain numbers refining the Narayana numbers. In terms of Dyck paths, this symmetry is interpreted in the following way: if $w_{n, k, m}$ is t…

math.CO2018★ 1 cited

A q-analogue and a symmetric function analogue of a result by Carlitz, Scoville and Vaughan

Yifei Li

We derive an equation that is analogous to a well-known symmetric function identity: $\sum_{i = 0}^{n} (- 1)^{i} e_{i} h_{n - i} = 0$ . Here the elementary symmetric function $e_{i}$ is the Frobenius…