3 papers
math.CO2026
Extensions and Deletions of matroid classes closed under flats
Jagdeep Singh, Vaidy Sivaraman
We call a class of matroids hereditary if it is closed under restriction to flats. For a hereditary class , its extension class consists of all matroids in $\mathcal{M…
math.CO2026
Structural Bounds and Forbidden Induced Subgraphs for Edge-Add Graph Classes
Jagdeep Singh, Vaidy Sivaraman
A class of graphs is hereditary if it is closed under taking induced subgraphs. We investigate the edge-add class, , consisting of graphs…
math.CO2024
Apex Graphs and Cographs
Jagdeep Singh, Vaidy Sivaraman, Thomas Zaslavsky
A class of graphs is called hereditary if it is closed under taking induced subgraphs. We denote by the class of graphs that contain a…