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math.CO2026
Pancyclicity in Graph Families with the Ore-Type Condition
Luyi Li, Yubo Wang, Guiying Yan
Let with , and let be a family of -vertex graphs on a common vertex set , where the graphs in the family…
math.CO2025
Planar Turán number of disjoint union of and
Luyi Li, Ping Li, Guiying Yan +1
The planar Turán number of , denoted by , is the maximum number of edges in an -vertex -free planar graph. The planar Turán number of vert…
math.CO2023
Transversals in a collections of trees
Ethan Y. H. Li, Luyi Li, Ping Li
Let be a fixed family of graphs on vertex set and be a collection of elements in . We investigated the transversal problem of finding t…