activity
20052026
most citedThe symmetric and unimodal expansion of Eulerian polynomials via continued fractions

74 citations · 263 across the 19 of their papers we have counts for

collaborators

23 papers

math.CO2026

Determining Particular Solutions for Exponential-Polynomial Forcing Terms in Linear Nonhomogeneous Recurrence Relations

Heesung Shin

This paper develops a systematic method for determining particular solutions of the th-order linear nonhomogeneous recurrence relation $$a_n + c_1 a_{n-1} + \cdots + c_k a_{n-k}…

math.CO2025

On (102,000)-avoiding inversion sequences

Sangwook Kim, Seunghyun Seo, Heesung Shin

In this article, we study (102,000)-avoiding inversion sequences with a fixed number of distinct elements. By introducing simple H-paths, we derive the trivariate generating functi…

math.CO2025

On 102-avoiding inversion sequences

JiSun Huh, Sangwook Kim, Seunghyun Seo +1

In this article, we provide a bijection between the set of inversion sequences avoiding the pattern 102 and the set of 2-Schröder paths having neither peaks nor valleys and ending…

math.CO2024

Bijections on pattern avoiding inversion sequences and related objects

JiSun Huh, Sangwook Kim, Seunghyun Seo +1

The number of inversion sequences avoiding two patterns and is known to be the same as the number of permutations avoiding three patterns , , and . Th…

math.CO2022

On Delannoy paths without peaks and valleys

Seunghyun Seo, Heesung Shin

A lattice path is called \emph{Delannoy} if its every step belongs to , where , , and steps. \emph{Peak}, \emph{valley}, and \em…

math.CO2020★ 6 cited

More bijections for Entringer and Arnold families

Heesung Shin, Jiang Zeng

The Euler number (resp. Entringer number ) enumerates the alternating (down-up) permutations of (resp. starting with ). The Springer number …