Finitely forcible graphons with an almost arbitrary structure
Discrete analysis (2020)
Voir la notice de l'article provenant de la source Scholastica
arXiv
Graphons are analytic objects representing convergent sequences of large graphs. A graphon is said to be finitely forcible if it is determined by finitely many subgraph densities, i.e., if the asymptotic structure of graphs represented by such a graphon depends only on finitely many density constraints. Such graphons appear in various scenarios, particularly in extremal combinatorics.
Lovasz and Szegedy conjectured that all finitely forcible graphons possess a simple structure. This was disproved in a strong sense by Cooper, Kral and Martins, who showed that any graphon is a subgraphon of a finitely forcible graphon. We strenghten this result by showing for every $\varepsilon>0$ that any graphon spans a $1-\varepsilon$ proportion of a finitely forcible graphon.
Daniel Kral; László Miklós Lovász; Jonathan A. Noel; Jakub Sosnovec. Finitely forcible graphons with an almost arbitrary structure. Discrete analysis (2020). http://geodesic.mathdoc.fr/item/DAS_2020_a14/
@article{DAS_2020_a14,
author = {Daniel Kral and L\'aszl\'o Mikl\'os Lov\'asz and Jonathan A. Noel and Jakub Sosnovec},
title = {Finitely forcible graphons with an almost arbitrary structure},
journal = {Discrete analysis},
year = {2020},
language = {en},
url = {http://geodesic.mathdoc.fr/item/DAS_2020_a14/}
}