activity
20182026
most citedOn zigzag maps and the path category of an inverse semigroup

1 citations · 1 across the 12 of their papers we have counts for

collaborators

13 papers

math.CO2026

Tight constructions for reconfigurations of independent transversals

Ronen Wdowinski

For a graph and partition of its vertex set, an independent transversal of is an independent set of that contains one vertex from each bloc…

math.CO2026

Sampling from the antiferromagnetic Ising model on bipartite, regular expander graphs

Anna Geisler, Mihyun Kang, Michail Sarantis +1

The antiferromagnetic Ising model samples subsets of vertices of a graph with weight decaying exponentially in the number of edges induced. We study the problem of sampling from th…

math.CO2026

Block-weighted random graphs: planar and beyond

Mihyun Kang, Zéphyr Salvy, Ronen Wdowinski

We investigate random connected graphs from a block-stable class whose distribution is weighted based on the number of -connected components, or blocks. This includes the class…

math.CO2025

Hall's theorem for reconfigurations and higher dimensional topological connectedness

Ronen Wdowinski

One widely applied sufficient condition for the existence of a colorful simplex in a vertex-colored simplicial complex is a topological extension of Hall's transversal theorem due…

math.CO2025

Counting independent sets in percolated graphs via the Ising model

Anna Geisler, Mihyun Kang, Michail Sarantis +1

Given a graph , we form a random subgraph by including each edge of independently with probability . We provide an asymptotic expansion of the expected number of in…

math.CO2024

Bounded degree graphs and hypergraphs with no full rainbow matchings

Ronen Wdowinski

Given a multi-hypergraph that is edge-colored into color classes , a full rainbow matching is a matching of that contains exactly one edge from each color…

math.CO2023

Constructing graphs with no independent transversals

Penny Haxell, Ronen Wdowinski

Given a graph and a partition of its vertex set, an independent transversal (IT) is an independent set of that contains one vertex from each block in . Various suffi…

math.CO2023

A precise condition for independent transversals in bipartite covers

Stijn Cambie, Penny Haxell, Ross J. Kang +1

Given a bipartite graph in which any vertex in (resp.~) has degree at most (resp.~), suppose there is a partition of that is a refin…

math.CO2023

Degree criteria and stability for independent transversals

Penny Haxell, Ronen Wdowinski

An \emph{independent transversal} (IT) in a graph with a given vertex partition is an independent set of vertices of (i.e. it induces no edges), that consists of one ve…

math.CO2023

On an -coloring generalization of linear arboricity of multigraphs

Ronen Wdowinski

Given a multigraph and function on its vertices, a degree- subgraph of is a spanning subgraph in which every vertex has deg…

math.CO2021

Orientation-based edge-colorings and linear arboricity of multigraphs

Ronen Wdowinski

The Goldberg-Seymour Conjecture for -colorings states that the -chromatic index of a loopless multigraph is essentially determined by either a maximum degree or a maximum den…

math.CO2018

Partitioning the power set of into -free parts

Eben Blaisdell, András Gyárfás, Robert A. Krueger +1

We show that for , in any partition of , the set of all subsets of , into parts, some part must contain a triangl…

math.GR2018★ 1 cited

On zigzag maps and the path category of an inverse semigroup

Allan Donsig, Jennifer Gensler, Hannah King +2

We study the path category of an inverse semigroup admitting unique maximal idempotents and give an abstract characterization of the inverse semigroups arising from zigzag maps on…