{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:3E6E4X6GEVALSLIR5YUZGIQDCC","short_pith_number":"pith:3E6E4X6G","schema_version":"1.0","canonical_sha256":"d93c4e5fc62540b92d11ee29932203108bec1df59e271395577730f333aeec2c","source":{"kind":"arxiv","id":"1807.03239","version":2},"attestation_state":"computed","paper":{"title":"Helicity dynamics, inverse and bi-directional cascades in fluid and MHD turbulence: A brief review","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"A. Pouquet, D. Rosenberg, J.E. Stawarz, R. Marino","submitted_at":"2018-07-09T15:40:07Z","abstract_excerpt":"We briefly review helicity dynamics, inverse and bi-directional cascades in fluid and magnetohydrodynamic (MHD) turbulence, with an emphasis on the latter. The energy of a turbulent system, an invariant in the non-dissipative case, is transferred to small scales through nonlinear mode coupling. Fifty years ago, it was realized that, for a two-dimensional fluid, energy cascades instead to larger scales, and so does magnetic helicity in three-dimensional MHD. However, evidence obtained recently indicates that in fact, for a range of governing parameters, there are systems for which their ideal 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":"1807.03239","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-07-09T15:40:07Z","cross_cats_sorted":[],"title_canon_sha256":"3612a20dbc65404121598d240a97085e32234fbb5670bdfb0127ed6c0f23c677","abstract_canon_sha256":"0fefe60b1ba2ffb9a35105dc6f964b93c1a701151de7f17cf21a4b2db36e86ab"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:33.700335Z","signature_b64":"glxRwPzep4sVR/YyayhlbguuiVzUaRGLD1J85f0+MRjB+AQX2Ie7CVWGeCnWtZhNKoprLcy2jsa926+w5A8rCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d93c4e5fc62540b92d11ee29932203108bec1df59e271395577730f333aeec2c","last_reissued_at":"2026-05-17T23:51:33.699618Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:33.699618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Helicity dynamics, inverse and bi-directional cascades in fluid and MHD turbulence: A brief review","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"A. Pouquet, D. Rosenberg, J.E. Stawarz, R. Marino","submitted_at":"2018-07-09T15:40:07Z","abstract_excerpt":"We briefly review helicity dynamics, inverse and bi-directional cascades in fluid and magnetohydrodynamic (MHD) turbulence, with an emphasis on the latter. The energy of a turbulent system, an invariant in the non-dissipative case, is transferred to small scales through nonlinear mode coupling. Fifty years ago, it was realized that, for a two-dimensional fluid, energy cascades instead to larger scales, and so does magnetic helicity in three-dimensional MHD. However, evidence obtained recently indicates that in fact, for a range of governing parameters, there are systems for which their ideal i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.03239","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":"1807.03239","created_at":"2026-05-17T23:51:33.699742+00:00"},{"alias_kind":"arxiv_version","alias_value":"1807.03239v2","created_at":"2026-05-17T23:51:33.699742+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.03239","created_at":"2026-05-17T23:51:33.699742+00:00"},{"alias_kind":"pith_short_12","alias_value":"3E6E4X6GEVAL","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_16","alias_value":"3E6E4X6GEVALSLIR","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_8","alias_value":"3E6E4X6G","created_at":"2026-05-18T12:32:02.567920+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/3E6E4X6GEVALSLIR5YUZGIQDCC","json":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC.json","graph_json":"https://pith.science/api/pith-number/3E6E4X6GEVALSLIR5YUZGIQDCC/graph.json","events_json":"https://pith.science/api/pith-number/3E6E4X6GEVALSLIR5YUZGIQDCC/events.json","paper":"https://pith.science/paper/3E6E4X6G"},"agent_actions":{"view_html":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC","download_json":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC.json","view_paper":"https://pith.science/paper/3E6E4X6G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1807.03239&json=true","fetch_graph":"https://pith.science/api/pith-number/3E6E4X6GEVALSLIR5YUZGIQDCC/graph.json","fetch_events":"https://pith.science/api/pith-number/3E6E4X6GEVALSLIR5YUZGIQDCC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC/action/storage_attestation","attest_author":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC/action/author_attestation","sign_citation":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC/action/citation_signature","submit_replication":"https://pith.science/pith/3E6E4X6GEVALSLIR5YUZGIQDCC/action/replication_record"}},"created_at":"2026-05-17T23:51:33.699742+00:00","updated_at":"2026-05-17T23:51:33.699742+00:00"}