4 papers
Strong complete minors in digraphs
Maria Axenovich, António Girão, Richard Snyder +1
Kostochka and Thomason independently showed that any graph with average degree contains a minor. In particular, any graph with chromatic number $Ω(r\sqrt{…
Bipartite independence number in graphs with bounded maximum degree
Maria Axenovich, Jean-Sébastien Sereni, Richard Snyder +1
We consider a natural, yet seemingly not much studied, extremal problem in bipartite graphs. A bi-hole of size in a bipartite graph is a copy of in the bipartite…
Large homogeneous subgraphs in bipartite graphs with forbidden induced subgraphs
Maria Axenovich, Casey Tompkins, Lea Weber
For a bipartite graph G, let h(G) be the largest t such that either G or the bipartite complement of G contain K_{t,t}. For a class F of graphs, let h(F)= min {h(G): G\in F}. We sa…
Supercooled fog as a natural laboratory for studying ice formation in clouds
Lea B. Weber, Franz Conen
The ice phase in clouds contributes largely to uncertainties in global climate models partly due to a lack of atmospheric observations. At moderate supercooling ice nucleating part…