In this paper, we study a multicut-mimicking network for a hypergraph over terminals T with a parameter c. It is a hypergraph preserving the minimum multicut values of any set of pairs over T where the value is at most c. This is a new variant of the multicut-mimicking network of a graph in [Wahlström ICALP'20], which introduces a parameter c and extends it to handle hypergraphs. Additionally, it is a natural extension of the connectivity-c mimicking network introduced by [Chalermsook et al. SODA'21] and [Jiang et al. ESA'22] that is a (hyper)graph preserving the minimum cut values between two subsets of terminals where the value is at most c. We propose an algorithm for a hypergraph that returns a multicut-mimicking network over terminals T with a parameter c having |T|c^O(rlog c) hyperedges in p^{1+o(1)} + |T|(c^rlog n)^{Õ(rc)}⋅m time, where p and r are the total size and the rank, respectively, of the hypergraph.
@InProceedings{cho_et_al:LIPIcs.ISAAC.2024.21, author = {Cho, Kyungjin and Oh, Eunjin}, title = {{Mimicking Networks for Constrained Multicuts in Hypergraphs}}, booktitle = {35th International Symposium on Algorithms and Computation (ISAAC 2024)}, pages = {21:1--21:14}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-354-6}, ISSN = {1868-8969}, year = {2024}, volume = {322}, editor = {Mestre, Juli\'{a}n and Wirth, Anthony}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ISAAC.2024.21}, URN = {urn:nbn:de:0030-drops-221487}, doi = {10.4230/LIPIcs.ISAAC.2024.21}, annote = {Keywords: hyperedge multicut, vertex sparsification, parameterized complexity} }
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