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math.CO2019
Extended Nestohedra and their Face Numbers
Quang Dao, Christina Meng, Julian Wellman +3
Nestohedra are a family of convex polytopes that includes permutohedra, associahedra, and graph associahedra. In this paper, we study an extension of such polytopes, called extende…
cs.DS2019
An Optimal Algorithm for Online Freeze-tag
Josh Brunner, Julian Wellman
In the freeze-tag problem, one active robot must wake up many frozen robots. The robots are considered as points in a metric space, where active robots move at a constant rate and…
math.CO2019
Flip cycles in plabic graphs
Alexey Balitskiy, Julian Wellman
Planar bicolored (plabic) graphs are combinatorial objects introduced by Postnikov to give parameterizations of the positroid cells of the totally nonnegative Grassmannian $\text{G…