{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:452YRE44HRX6ISUL4HHZBYOGOJ","short_pith_number":"pith:452YRE44","schema_version":"1.0","canonical_sha256":"e77588939c3c6fe44a8be1cf90e1c67252d12e6779d07957f1b657bff427f640","source":{"kind":"arxiv","id":"2608.10968","version":1},"attestation_state":"computed","paper":{"title":"Cross-Cutting Exposure as an Engine of Radicalization: Platform Design, Attention, and Geography in a Stochastic Multiplex Model of Opinion Dynamics","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.soc-ph","authors_text":"Ruben E. Ara\\'ujo","submitted_at":"2026-08-11T14:29:46Z","abstract_excerpt":"Do social-media platforms polarize because they hide disagreement, or because they expose people to it? We study a continuous-time model in which agents diffuse in physical space by Brownian motion while interacting through an adaptive, algorithmically curated digital network under a finite attention budget. When influence is purely assimilative (bounded confidence), opinion-blind long-range exposure heals locality-induced fragmentation and algorithmic homophily builds echo chambers. Once influence includes a repulsive response to strongly opposed views, the ranking of platform designs inverts"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2608.10968","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.soc-ph","submitted_at":"2026-08-11T14:29:46Z","cross_cats_sorted":[],"title_canon_sha256":"11d419ad101f5b7ff9b950d7fddb5c25d4f3288bf8e314ce4b42ec1af5578561","abstract_canon_sha256":"2929fdae7453871cdb6066c43bb4034aacf3ff76b303a5831fcfd09d0573d29a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-12T01:23:55.778352Z","signature_b64":"GuC0TxSnQj+d24X5xGfiBtPjYBY5akBAdFBRvuPIOAcEVBOROEFPhm0H9yruo9Pg+TGlERTKuML6CpqZmpeMBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e77588939c3c6fe44a8be1cf90e1c67252d12e6779d07957f1b657bff427f640","last_reissued_at":"2026-08-12T01:23:55.776490Z","signature_status":"signed_v1","first_computed_at":"2026-08-12T01:23:55.776490Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Cross-Cutting Exposure as an Engine of Radicalization: Platform Design, Attention, and Geography in a Stochastic Multiplex Model of Opinion Dynamics","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.soc-ph","authors_text":"Ruben E. Ara\\'ujo","submitted_at":"2026-08-11T14:29:46Z","abstract_excerpt":"Do social-media platforms polarize because they hide disagreement, or because they expose people to it? We study a continuous-time model in which agents diffuse in physical space by Brownian motion while interacting through an adaptive, algorithmically curated digital network under a finite attention budget. When influence is purely assimilative (bounded confidence), opinion-blind long-range exposure heals locality-induced fragmentation and algorithmic homophily builds echo chambers. Once influence includes a repulsive response to strongly opposed views, the ranking of platform designs inverts"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.10968","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/2608.10968/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2608.10968","created_at":"2026-08-12T01:23:55.780519+00:00"},{"alias_kind":"arxiv_version","alias_value":"2608.10968v1","created_at":"2026-08-12T01:23:55.780519+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.10968","created_at":"2026-08-12T01:23:55.780519+00:00"},{"alias_kind":"pith_short_12","alias_value":"452YRE44HRX6","created_at":"2026-08-12T01:23:55.780519+00:00"},{"alias_kind":"pith_short_16","alias_value":"452YRE44HRX6ISUL","created_at":"2026-08-12T01:23:55.780519+00:00"},{"alias_kind":"pith_short_8","alias_value":"452YRE44","created_at":"2026-08-12T01:23:55.780519+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ","json":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ.json","graph_json":"https://pith.science/api/pith-number/452YRE44HRX6ISUL4HHZBYOGOJ/graph.json","events_json":"https://pith.science/api/pith-number/452YRE44HRX6ISUL4HHZBYOGOJ/events.json","paper":"https://pith.science/paper/452YRE44"},"agent_actions":{"view_html":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ","download_json":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ.json","view_paper":"https://pith.science/paper/452YRE44","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2608.10968&json=true","fetch_graph":"https://pith.science/api/pith-number/452YRE44HRX6ISUL4HHZBYOGOJ/graph.json","fetch_events":"https://pith.science/api/pith-number/452YRE44HRX6ISUL4HHZBYOGOJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ/action/storage_attestation","attest_author":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ/action/author_attestation","sign_citation":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ/action/citation_signature","submit_replication":"https://pith.science/pith/452YRE44HRX6ISUL4HHZBYOGOJ/action/replication_record"}},"created_at":"2026-08-12T01:23:55.780519+00:00","updated_at":"2026-08-12T01:23:55.780519+00:00"}