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06.19.2023. - 06.23.2023.
Rényi Institute
A research workshop on interactions between singularity theory and low dimensional topology.
09.04.2023. - 09.08.2023.
Erdős Center
The aim of the workshop is to bring together junior and senior researchers with backgrounds ranging from discrete and computational geometry to analysis and probability theory with the common theme of studying geometric problems, often related to convexity in a broad sense.
10.23.2023. - 10.29.2023.
Rényi Institute

For a graph \(G=(V,E)\) with edge weight \(w:E\rightarrow \mathbb{R}^+\), a \(t\)-spanner is a spanning subgraph \(H\) such that for all pair of vertices \(u,v\in V\), we have \(d_H(u,v)\leq t\cdot d_G(u,v)\), where \(d_G(u,v)\) denotes the shortest path distance between vertices \(u\) and \(v\) in \(G\). That is, \(H\) distorts distances in \(G\) by a factor of at most \(t\), which is called the spanning ratio or stretch factor of \(H\).