activity
20052022
most citedAn improved algorithm for the vertex cover problem on graphs of bounded treewidth

12 citations · 17 across the 12 of their papers we have counts for

collaborators

12 papers

math.CO2022

A Survey on the k-Path Vertex Cover Problem

Jianhua Tu

Given a graph and a positive integer , a -path vertex cover is a subset of vertices such that every path on vertices in contains at least one vertex…

math.CO2021★ 1 cited

Maximal and Maximum Dissociation Sets in General and Triangle-Free Graphs

Jianhua Tu, Yuxin Li, Junfeng Du

A subset of vertices in a graph is called a \emph{dissociation set} if the induced subgraph of has maximum degree at most 1. A \emph{maximal dissociation set} of…

math.CO2021

On the maximum number of maximum dissociation sets in trees with given dissociation number

Jianhua Tu, Lei Zhang, Junfeng Du

In a graph , a subset of vertices is a dissociation set if it induces a subgraph with vertex degree at most 1. A maximum dissociation set is a dissociation set of maximum cardin…

math.CO2021

Polynomial time recognition of vertices contained in all (or no) maximum dissociation sets of a tree

Jianhua Tu, Lei Zhang, Junfeng Du +1

In a graph G, a dissociation set is a subset of vertices which induces a subgraph with vertex degree at most 1. Finding a dissociation set of maximum cardinality in a graph is NP-h…

math.CO2020

Maximum dissociation sets in subcubic trees

Lei Zhang, Jianhua Tu, Chunlin Xin

A subset of vertices in a graph is called a maximum dissociation set if it induces a subgraph with vertex degree at most 1 and the subset has maximum cardinality. The dissociat…

math.CO2019

The maximum number of maximum dissociation sets in trees

Tu Jianhua, Zhang Zhipeng, Shi Yongtang

A subset of vertices is a {\it maximum independent set} if no two of the vertices are adjacent and the subset has maximum cardinality. A subset of vertices is called a {\it maximum…