Abstract
Let \({\mathcal {G}} = \{G_1 = (V, E_1), \ldots , G_m = (V, E_m)\}\) be a collection of m graphs defined on a common set of vertices V but with different edge sets \(E_1, \ldots , E_m\). Informally, a function \(f :V \rightarrow {\mathbb {R}}\) is smooth with respect to \(G_k = (V,E_k)\) if \(f(u) \sim f(v)\) whenever \((u, v) \in E_k\). We study the problem of understanding whether there exists a nonconstant function that is smooth with respect to all graphs in \({\mathcal {G}}\), simultaneously, and how to find it if it exists.
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Communicated by Pencho Petrushev.
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R.R.C is supported by the NIH (5R01NS100049-04). N.F.M. is supported by the NSF (DMS-1903015). S.S. is supported by the NSF (DMS-2123224) and the Alfred P. Sloan Foundation.
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Coifman, R.R., Marshall, N.F. & Steinerberger, S. A Common Variable Minimax Theorem for Graphs. Found Comput Math 23, 493–517 (2023). https://doi.org/10.1007/s10208-022-09558-8
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DOI: https://doi.org/10.1007/s10208-022-09558-8