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20242026
most citedLongest cycles and longest chordless cycles in -connected graphs

1 citations · 1 across the 14 of their papers we have counts for

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14 papers

math.CO2026

Every fork-free graph is perfectly weight divisible

Feng Liu, Shuang Sun, Yan Wang +2

A graph is \emph{perfectly weight divisible} if, for every positive integral weight function on and every induced subgraph of with at least one edge, the vertex…

math.CO2026

Optimal coloring of -free graphs with no short odd holes

Feng Liu, Shuang Sun, Yan Wang

A \emph{hole} is an induced cycle of length at least four, and an \emph{even hole} is a hole of even length. A \emph{cap} is obtained from a hole by adding a vertex adjacent to exa…

math.CO2026

Edge-disjoint Hamilton cycles under a bipartite-hole condition

Yanan Hu, Chengli Li, Feng Liu

In 2017, McDiarmid and Yolov introduced the bipartite-hole-number and proved that forces a Hamilton cycle. They also gave a sufficient con…

math.CO2026

Tight Bound for Nikiforov's Spectral Even-Cycle Conjecture

Peiru Kuang, Feng Liu, Shuang Sun +2

Nikiforov conjectured that, for every fixed and all sufficiently large , the unique -vertex -free graph with maximum adjacency spectral radius is $S^+_{n,k}…

math.CO2026

On the structures of {diamond, bowtie}-free graphs that do not contain an induced subdivision of

Feng Liu, Shuang Sun, Yan Wang

A graph is -free if it contains no induced subdivision of . Lévêque et al. [\emph{J. Combin. Theory Ser. B} \textbf{102} (2012) 924--947] conjectured that all…

math.CO2026

On the Borodin--Kostochka conjecture for graphs with large maximum degree

Feng Liu, Shuang Sun, Yan Wang +1

The Borodin--Kostochka conjecture states that every graph with maximum degree satisfies . In this paper, we verify this conjecture for…

cs.LO2025

Just-In-Time Piecewise-Linear Semantics for ReLU-type Networks

Hongyi Duan, Haoyang Liu, Jian'an Zhang +2

We present a JIT PL semantics for ReLU-type networks that compiles models into a guarded CPWL transducer with shared guards. The system adds hyperplanes only when operands are affi…

math.CO2025

Cycles and paths through vertices whose degrees are at least the bipartite-hole-number

Chengli Li, Feng Liu, Yurui Tang

The bipartite-hole-number of a graph , denoted by , is the minimum integer such that there exist positive integers and with , satisfyi…

math.CO2025

Trisimplicial vertices in (fork, odd parachute)-free graphs

Kaiyang Lan, Feng Liu, Di Wu +1

An {\em odd hole} in a graph is an induced subgraph which is a cycle of odd length at least five. An {\em odd parachute} is a graph obtained from an odd hole by adding a new ed…

math.CO2025

An Ore-type condition for hamiltonicity in graphs

Chengli Li, Feng Liu

The bipartite-hole-number of a graph , denoted as , is the minimum number such that there exist positive integers and with with the propert…

math.CO2024

Constructions of minimally -tough regular graphs

Kun Cheng, Chengli Li, Feng Liu

A non-complete graph is said to be -tough if for every vertex cut of , the ratio of to the number of components of is at least . The toughness o…

math.CO2024★ 1 cited

Longest cycles and longest chordless cycles in -connected graphs

Yanan Hu, Chengli Li, Feng Liu

Thomassen's chord conjecture from 1976 states that every longest cycle in a -connected graph has a chord. The circumference and induced circumference of a graph $…

math.CO2024

The minimum size and maximum diameter of an edge-pancyclic graph of a given order

Chengli Li, Feng Liu, Xingzhi Zhan

A -cycle in a graph is a cycle of length A graph of order is called edge-pancyclic if for every integer with every edge of lies in a -cycl…

math.CO2024

Bound vertices of longest paths between two vertices in cubic graphs

Chengli Li, Feng Liu

Thomassen's chord conjecture from 1976 states that every longest cycle in a -connected graph has a chord. This is one of the most important unsolved problems in graph theory. Le…