{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:QW6RXBO6IWJDDFCTKZOAV2LZMX","short_pith_number":"pith:QW6RXBO6","schema_version":"1.0","canonical_sha256":"85bd1b85de4592319453565c0ae97965fc0ef836b88e1a23368878854f8c5025","source":{"kind":"arxiv","id":"1602.00561","version":3},"attestation_state":"computed","paper":{"title":"The geometry of thresholdless active flow in nematic microfluidics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"John Toner, Richard Green, Vincenzo Vitelli","submitted_at":"2016-02-01T15:28:10Z","abstract_excerpt":"\"Active nematics\" are orientationally ordered but apolar fluids composed of interacting constituents individually powered by an internal source of energy. When activity exceeds a system-size dependent threshold, spatially uniform active apolar fluids undergo a hydrodynamic instability leading to spontaneous macroscopic fluid flow. Here, we show that a special class of spatially non-uniform configurations of such active apolar fluids display laminar (i.e., time-independent) flow even for arbitrarily small activity. We also show that two-dimensional active nematics confined on a surface of non-v"},"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":"1602.00561","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2016-02-01T15:28:10Z","cross_cats_sorted":[],"title_canon_sha256":"cab57393dbf44fc2c236c7b02896cff339ae6b04bb275a2ae87711f7ebd456b3","abstract_canon_sha256":"29f9d009f7d4afffd41dfd27e0c9b07742fe35f59e015a3bb2cb37f4f6ec0411"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:07.296012Z","signature_b64":"dF5InWZJheO5/B0KkC9tzfUfBrk8GjRiM6y16PfehuhCmh/pymO03Vvc6kjBUuP8/fZubMlAX12cjsgex/l3Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85bd1b85de4592319453565c0ae97965fc0ef836b88e1a23368878854f8c5025","last_reissued_at":"2026-05-18T00:31:07.295228Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:07.295228Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The geometry of thresholdless active flow in nematic microfluidics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"John Toner, Richard Green, Vincenzo Vitelli","submitted_at":"2016-02-01T15:28:10Z","abstract_excerpt":"\"Active nematics\" are orientationally ordered but apolar fluids composed of interacting constituents individually powered by an internal source of energy. When activity exceeds a system-size dependent threshold, spatially uniform active apolar fluids undergo a hydrodynamic instability leading to spontaneous macroscopic fluid flow. Here, we show that a special class of spatially non-uniform configurations of such active apolar fluids display laminar (i.e., time-independent) flow even for arbitrarily small activity. We also show that two-dimensional active nematics confined on a surface of non-v"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.00561","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"1602.00561","created_at":"2026-05-18T00:31:07.295382+00:00"},{"alias_kind":"arxiv_version","alias_value":"1602.00561v3","created_at":"2026-05-18T00:31:07.295382+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.00561","created_at":"2026-05-18T00:31:07.295382+00:00"},{"alias_kind":"pith_short_12","alias_value":"QW6RXBO6IWJD","created_at":"2026-05-18T12:30:41.710351+00:00"},{"alias_kind":"pith_short_16","alias_value":"QW6RXBO6IWJDDFCT","created_at":"2026-05-18T12:30:41.710351+00:00"},{"alias_kind":"pith_short_8","alias_value":"QW6RXBO6","created_at":"2026-05-18T12:30:41.710351+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/QW6RXBO6IWJDDFCTKZOAV2LZMX","json":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX.json","graph_json":"https://pith.science/api/pith-number/QW6RXBO6IWJDDFCTKZOAV2LZMX/graph.json","events_json":"https://pith.science/api/pith-number/QW6RXBO6IWJDDFCTKZOAV2LZMX/events.json","paper":"https://pith.science/paper/QW6RXBO6"},"agent_actions":{"view_html":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX","download_json":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX.json","view_paper":"https://pith.science/paper/QW6RXBO6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1602.00561&json=true","fetch_graph":"https://pith.science/api/pith-number/QW6RXBO6IWJDDFCTKZOAV2LZMX/graph.json","fetch_events":"https://pith.science/api/pith-number/QW6RXBO6IWJDDFCTKZOAV2LZMX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX/action/storage_attestation","attest_author":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX/action/author_attestation","sign_citation":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX/action/citation_signature","submit_replication":"https://pith.science/pith/QW6RXBO6IWJDDFCTKZOAV2LZMX/action/replication_record"}},"created_at":"2026-05-18T00:31:07.295382+00:00","updated_at":"2026-05-18T00:31:07.295382+00:00"}