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- W4380876918 abstract "Structural convergence is a framework for convergence of graphs by Nev{s}etv{r}il and Ossona de Mendez that unifies the dense (left) graph convergence and Benjamini-Schramm convergence. They posed a problem asking whether for a given sequence of graphs $(G_n)$ converging to a limit $L$ and a vertex $r$ of $L$ it is possible to find a sequence of vertices $(r_n)$ such that $L$ rooted at $r$ is the limit of the graphs $G_n$ rooted at $r_n$. A counterexample was found by Christofides and Kr'{a}l', but they showed that the statement holds for almost all vertices $r$ of $L$. We offer another perspective to the original problem by considering the size of definable sets to which the root $r$ belongs. We prove that if $r$ is an algebraic vertex (i.e. belongs to a finite definable set), the sequence of roots $(r_n)$ always exists." @default.
- W4380876918 created "2023-06-17" @default.
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- W4380876918 date "2023-01-01" @default.
- W4380876918 modified "2023-10-16" @default.
- W4380876918 title "Rooting algebraic vertices of convergent sequences" @default.
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- W4380876918 doi "https://doi.org/10.5817/cz.muni.eurocomb23-075" @default.
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