Hailun Zheng

collaborators

2 papers

math.CO2023

The merging operation and $(d - i)$ -simplicial $i$ -simple $d$ -polytopes

Isabella Novik, Hailun Zheng

We define a certain merging operation that given two $d$ -polytopes $P$ and $Q$ such that $P$ has a simplex facet $F$ and $Q$ has a simple vertex $v$ produces a new $d$ -polytope $P\…

math.CO2022

Neighborly spheres and transversal numbers

Isabella Novik, Hailun Zheng

We survey several old and new problems related to the number of simplicial spheres, the number of neighborly simplicial spheres, the number of centrally symmetric simplicial sphere…

The merging operation and (d−i)-simplicial i-simple d-polytopes

Neighborly spheres and transversal numbers

The merging operation and $(d - i)$ -simplicial $i$ -simple $d$ -polytopes