Ben Lund, Maximal 3-wise intersecting families
Room B232 IBS (기초과학연구원)A family
A family
A well-known theorem of Whitney states that a 3-connected planar graph admits an essentially unique embedding into the 2-sphere. We prove a 3-dimensional analogue: a simply-connected 2-complex every link graph …
The poset Ramsey number
What is the largest number
The independent domination number of a graph
We give some natural sufficient conditions for balls in a metric space to have small intersection. Roughly speaking, this happens when the metric space is (i) expanding and (ii) well-spread, …
Motivated from the surrounding property of a point set in
A geometric transversal to a family of convex sets in
For given
In a reduction sequence of a graph, vertices are successively identified until the graph has one vertex. At each step, when identifying