{"paper":{"title":"Computationally Efficient Collaborative Communication Via Regularity-Based Coarsening","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.DS","cs.LG"],"primary_cat":"cs.GT","authors_text":"Mark Bedaywi, Nika Haghtalab, Scott Emmons, Stuart Russell","submitted_at":"2026-08-05T18:34:19Z","abstract_excerpt":"Our results show that the existence of a short high-utility protocol already suffices for efficient communication. In particular, in a game with $n$ possible observations and $m$ actions: (1) For any achievable target utility $\\alpha$, we give an algorithm with $\\mathrm{poly}(n, m, 1/\\epsilon)$ runtime that designs a protocol achieving utility at least $\\alpha-\\epsilon$ using only $2^{\\mathcal O(CC_\\alpha(G))}/\\epsilon^2$ bits of communication. Here, $CC_\\alpha(G)$ is the minimum number of bits used by any protocol, even a computationally inefficient one, to achieve utility $\\alpha$. (2) We pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.05327","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.05327/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}