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math.CO2026
The maximum number of odd cycles in planar graphs forbidding shorter odd cycles
Yichen Wang, Ervin Győri, Zhen He
Given a graph and a family of graphs , the generalized planar Turán number is the maximum number of copies of in a…
math.CO2026
Turán-Type Extremal Results for Distance- Graphs
Zhen He, Nika Salia, Casey Tompkins +1
We study Turán-type extremal problems for distance graphs, motivated by work of Csikvári, Bollobás, Tyomkyn, and Uzzell. We determine the maximum number of vertex pairs at distance…