Blog posts

2025

What do bags of decompositions represent?

5 minute read

One main aim of my work on local-global decompositions is to define a graph width parameter which captures precisely when a graph has dense local structure. Width in this context is the maximum size of a bag of a certain kind of graph-decomposition. So, for notions of “local width” to succeed, bags of decompositions must interact in some way with local dense structures. But how, exactly?

Reading list

2 minute read

A list of papers I want to read in the near future.

The right definition of decomposition

12 minute read

Graph-decompositions are defined by taking the definition of tree-decomposition, crossing out “tree”, and writing “graph” instead. Is this the right definition?

The local cover

less than 1 minute read

The local cover is a new object designed to model the local structure of a graph. I wrote a survey explaining the local cover.