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arXiv · 2601.09551

Proof of a Conjecture on Young Tableaux with Walls

Zhicong Lin·Feihu Liu·Jiahang Liu·Jing Liu·Guoce Xin
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Abstract

Banderier, Marchal, and Wallner considered Young tableaux with walls, which are similar to standard Young tableaux, except that local decreases are allowed at some walls. In this work, we prove a conjecture of Fuchs and Yu concerning the enumeration of two classes of three-row Young tableaux with walls. Together with the work of Chang, Fuchs, Liu, Wallner, and Yu, our result verifies a conjecture of Pons and Batle on tree-child networks. This conjecture had been regarded as a specific and challenging problem in the phylogenetics community until its resolution in the present work.

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Zhicong Lin, Feihu Liu, Jiahang Liu, Jing Liu, Guoce Xin. 2026-01-14. Proof of a Conjecture on Young Tableaux with Walls. https://arxiv.org/abs/2601.09551

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