{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:RCD6MYRZUUP2CEROETUMCDHNNI","short_pith_number":"pith:RCD6MYRZ","schema_version":"1.0","canonical_sha256":"8887e66239a51fa1122e24e8c10ced6a082d95c4290046a124426de613c3a035","source":{"kind":"arxiv","id":"2302.04259","version":2},"attestation_state":"computed","paper":{"title":"Spontaneous flow instabilities of active polar fluids in three dimensions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Abhinav Singh, Frank J\\\"ulicher, Ivo F. Sbalzarini, Quentin Vagne","submitted_at":"2023-02-08T18:50:29Z","abstract_excerpt":"Active polar fluids exhibit spontaneous flow when sufficient active stress is generated by internal molecular mechanisms. This is also referred to as an active Fr\\'{e}edericksz transition. Experiments have revealed the existence of competing in-plane and out-of-plane instabilities in three-dimensional active matter. So far, however, a theoretical model reconciling all observations is missing. In particular, the role of boundary conditions in these instabilities still needs to be explained. Here, we characterize the spontaneous flow transition in a symmetry-preserving three-dimensional active E"},"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":"2302.04259","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-02-08T18:50:29Z","cross_cats_sorted":[],"title_canon_sha256":"f1b1f8246885dcef64f5040216ea1848d27f4f4e03b4a4e096dc14bd7d99df15","abstract_canon_sha256":"728c9fd47cba4598dc3cff21607b2504e82537e85ef87a15c7a30eaf9bdf4b74"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:00:58.837337Z","signature_b64":"hdpGMj1/tRvne31vwxb27UNv14n/NwWKgujpNaaILVsKKfm/B6JVJrXzXetuQIw09ljUko/uEEXnTfVApsHaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8887e66239a51fa1122e24e8c10ced6a082d95c4290046a124426de613c3a035","last_reissued_at":"2026-07-05T07:00:58.836884Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:00:58.836884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spontaneous flow instabilities of active polar fluids in three dimensions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Abhinav Singh, Frank J\\\"ulicher, Ivo F. Sbalzarini, Quentin Vagne","submitted_at":"2023-02-08T18:50:29Z","abstract_excerpt":"Active polar fluids exhibit spontaneous flow when sufficient active stress is generated by internal molecular mechanisms. This is also referred to as an active Fr\\'{e}edericksz transition. Experiments have revealed the existence of competing in-plane and out-of-plane instabilities in three-dimensional active matter. So far, however, a theoretical model reconciling all observations is missing. In particular, the role of boundary conditions in these instabilities still needs to be explained. Here, we characterize the spontaneous flow transition in a symmetry-preserving three-dimensional active E"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.04259","kind":"arxiv","version":2},"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/2302.04259/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":"2302.04259","created_at":"2026-07-05T07:00:58.836947+00:00"},{"alias_kind":"arxiv_version","alias_value":"2302.04259v2","created_at":"2026-07-05T07:00:58.836947+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.04259","created_at":"2026-07-05T07:00:58.836947+00:00"},{"alias_kind":"pith_short_12","alias_value":"RCD6MYRZUUP2","created_at":"2026-07-05T07:00:58.836947+00:00"},{"alias_kind":"pith_short_16","alias_value":"RCD6MYRZUUP2CERO","created_at":"2026-07-05T07:00:58.836947+00:00"},{"alias_kind":"pith_short_8","alias_value":"RCD6MYRZ","created_at":"2026-07-05T07:00:58.836947+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/RCD6MYRZUUP2CEROETUMCDHNNI","json":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI.json","graph_json":"https://pith.science/api/pith-number/RCD6MYRZUUP2CEROETUMCDHNNI/graph.json","events_json":"https://pith.science/api/pith-number/RCD6MYRZUUP2CEROETUMCDHNNI/events.json","paper":"https://pith.science/paper/RCD6MYRZ"},"agent_actions":{"view_html":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI","download_json":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI.json","view_paper":"https://pith.science/paper/RCD6MYRZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2302.04259&json=true","fetch_graph":"https://pith.science/api/pith-number/RCD6MYRZUUP2CEROETUMCDHNNI/graph.json","fetch_events":"https://pith.science/api/pith-number/RCD6MYRZUUP2CEROETUMCDHNNI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI/action/storage_attestation","attest_author":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI/action/author_attestation","sign_citation":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI/action/citation_signature","submit_replication":"https://pith.science/pith/RCD6MYRZUUP2CEROETUMCDHNNI/action/replication_record"}},"created_at":"2026-07-05T07:00:58.836947+00:00","updated_at":"2026-07-05T07:00:58.836947+00:00"}