时间：2026年4月15日（周三）14:00-16:00
地点：E14-116
主讲人：Liping Yuan, Hebei Normal University
讲座主题：On ℱ-convexity and related problems
讲座摘要: Let ℱ be a family of sets in IR𝑑. A set 𝑀 ⊂ IR𝑑 is called ℱ-convex if for any pair of distinct points 𝑥, 𝑦 ∈ 𝑀, there is a set 𝐹 ∈ ℱ such that 𝑥, 𝑦 ∈ 𝐹 and 𝐹 ⊂ 𝑀. In this talk we'll discuss ℱ-convexity and related problems for some interesting families ℱ, including characterizations of ℱ-convex sets, ℱ-convex completions, generic ℱ-convexity, ℱ-convex functions, and ℱ-convexity in graphs.
Based on joint work with Professor Tudor Zamfirescu and students in my group.
