Year: 2026
Type: preprint
Abstract: We give a short proof of Zhang's conjecture that the number of stack-sortable permutations of length $n + 1$ which end in their smallest element is equal to the $n$-th Motzkin number.
Source: arXiv (Cornell University)
Author: Lu, Maximus
Language: English
Subfield: Discrete Mathematics and Combinatorics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223696849