{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:T2TUI6WLLKILRBJTMV5ZC46I5Q","short_pith_number":"pith:T2TUI6WL","schema_version":"1.0","canonical_sha256":"9ea7447acb5a90b88533657b9173c8ec13c99a046b35e8beec302063fda6827d","source":{"kind":"arxiv","id":"1606.06778","version":2},"attestation_state":"computed","paper":{"title":"Vortex Identification from Local Properties of the Vorticity Field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"J.H. Elsas, L. Moriconi","submitted_at":"2016-06-21T21:33:46Z","abstract_excerpt":"It has been broadly acknowledged that vortex detection algorithms, usually based on linear-algebraic properties of the velocity gradient tensor, can be plagued with severe shortcomings and may become, in practical terms, dependent on the choice of subjective threshold parameters in their implementations. In two-dimensions, a large class of standard vortex identification prescriptions turn out to be equivalent to the \"swirling strength criterion\" ($\\lambda_{ci}$-criterion), which is critically revisited in this work. We classify the instances where the accuracy of the $\\lambda_{ci}$-criterion i"},"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":"1606.06778","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-06-21T21:33:46Z","cross_cats_sorted":[],"title_canon_sha256":"b5f1bb177a3dc85813a48f65c338c37376abc2e46899d38b8eb3f19b0c3921d3","abstract_canon_sha256":"fb842fd584de48523679e231fa23b173e4cfaf03b898667138fcd722940eb5a0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:39.449965Z","signature_b64":"zaaUehszFy8B7Vml7KKgs6wVXFKB/ET19tUR/x8m5vXAs7lzJDjPyhc7d6vGr0Yd71/mbs7EZs4Lz2MaroaiDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ea7447acb5a90b88533657b9173c8ec13c99a046b35e8beec302063fda6827d","last_reissued_at":"2026-05-18T00:52:39.449299Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:39.449299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Vortex Identification from Local Properties of the Vorticity Field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"J.H. Elsas, L. Moriconi","submitted_at":"2016-06-21T21:33:46Z","abstract_excerpt":"It has been broadly acknowledged that vortex detection algorithms, usually based on linear-algebraic properties of the velocity gradient tensor, can be plagued with severe shortcomings and may become, in practical terms, dependent on the choice of subjective threshold parameters in their implementations. In two-dimensions, a large class of standard vortex identification prescriptions turn out to be equivalent to the \"swirling strength criterion\" ($\\lambda_{ci}$-criterion), which is critically revisited in this work. We classify the instances where the accuracy of the $\\lambda_{ci}$-criterion i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.06778","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":""},"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":"1606.06778","created_at":"2026-05-18T00:52:39.449456+00:00"},{"alias_kind":"arxiv_version","alias_value":"1606.06778v2","created_at":"2026-05-18T00:52:39.449456+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.06778","created_at":"2026-05-18T00:52:39.449456+00:00"},{"alias_kind":"pith_short_12","alias_value":"T2TUI6WLLKIL","created_at":"2026-05-18T12:30:44.179134+00:00"},{"alias_kind":"pith_short_16","alias_value":"T2TUI6WLLKILRBJT","created_at":"2026-05-18T12:30:44.179134+00:00"},{"alias_kind":"pith_short_8","alias_value":"T2TUI6WL","created_at":"2026-05-18T12:30:44.179134+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/T2TUI6WLLKILRBJTMV5ZC46I5Q","json":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q.json","graph_json":"https://pith.science/api/pith-number/T2TUI6WLLKILRBJTMV5ZC46I5Q/graph.json","events_json":"https://pith.science/api/pith-number/T2TUI6WLLKILRBJTMV5ZC46I5Q/events.json","paper":"https://pith.science/paper/T2TUI6WL"},"agent_actions":{"view_html":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q","download_json":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q.json","view_paper":"https://pith.science/paper/T2TUI6WL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1606.06778&json=true","fetch_graph":"https://pith.science/api/pith-number/T2TUI6WLLKILRBJTMV5ZC46I5Q/graph.json","fetch_events":"https://pith.science/api/pith-number/T2TUI6WLLKILRBJTMV5ZC46I5Q/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q/action/timestamp_anchor","attest_storage":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q/action/storage_attestation","attest_author":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q/action/author_attestation","sign_citation":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q/action/citation_signature","submit_replication":"https://pith.science/pith/T2TUI6WLLKILRBJTMV5ZC46I5Q/action/replication_record"}},"created_at":"2026-05-18T00:52:39.449456+00:00","updated_at":"2026-05-18T00:52:39.449456+00:00"}