{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:EVXPABNV2ESBAMSEBQDENXOOLB","short_pith_number":"pith:EVXPABNV","schema_version":"1.0","canonical_sha256":"256ef005b5d1241032440c0646ddce58444df225675635fc33cfc9ffe0b0e6c5","source":{"kind":"arxiv","id":"1908.06260","version":1},"attestation_state":"computed","paper":{"title":"Note on wavefront dislocation in surface water waves","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.flu-dyn"],"primary_cat":"nlin.PS","authors_text":"E. van Groesen, N. Karjanto","submitted_at":"2019-08-17T08:14:00Z","abstract_excerpt":"At singular points of a wave field, where the amplitude vanishes, the phase may become singular and wavefront dislocation may occur. In this Letter, we investigate for wave fields in one spatial dimension the appearance of these essentially linear phenomena. We introduce the Chu-Mei quotient as it is known to appear in the 'nonlinear dispersion relation' for wave groups as a consequence of the nonlinear transformation of the complex amplitude to real phase-amplitude variables. We show that unboundedness of this quotient at a singular point, related to unboundedness of the local wavenumber and "},"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":"1908.06260","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nlin.PS","submitted_at":"2019-08-17T08:14:00Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"e5ec9198b5e4757ce39b890c2f40348d0fdf07a7d845492a2a009b0d5bcf7d85","abstract_canon_sha256":"523f035db433197c3e36e09a7fe6b0cb43d70fbc7b93bfba321f45c783b26027"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:58:13.971641Z","signature_b64":"Wonr65CTwxmOqaCjqDJRxvtWdHYQQsfDvebzbuwyUoHDBJybNqm0xT/wkwcTecQg2/VetVCr0JmZq61eNWAyAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"256ef005b5d1241032440c0646ddce58444df225675635fc33cfc9ffe0b0e6c5","last_reissued_at":"2026-07-04T23:58:13.970726Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:58:13.970726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Note on wavefront dislocation in surface water waves","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.flu-dyn"],"primary_cat":"nlin.PS","authors_text":"E. van Groesen, N. Karjanto","submitted_at":"2019-08-17T08:14:00Z","abstract_excerpt":"At singular points of a wave field, where the amplitude vanishes, the phase may become singular and wavefront dislocation may occur. In this Letter, we investigate for wave fields in one spatial dimension the appearance of these essentially linear phenomena. We introduce the Chu-Mei quotient as it is known to appear in the 'nonlinear dispersion relation' for wave groups as a consequence of the nonlinear transformation of the complex amplitude to real phase-amplitude variables. We show that unboundedness of this quotient at a singular point, related to unboundedness of the local wavenumber and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06260","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/1908.06260/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":"1908.06260","created_at":"2026-07-04T23:58:13.971230+00:00"},{"alias_kind":"arxiv_version","alias_value":"1908.06260v1","created_at":"2026-07-04T23:58:13.971230+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06260","created_at":"2026-07-04T23:58:13.971230+00:00"},{"alias_kind":"pith_short_12","alias_value":"EVXPABNV2ESB","created_at":"2026-07-04T23:58:13.971230+00:00"},{"alias_kind":"pith_short_16","alias_value":"EVXPABNV2ESBAMSE","created_at":"2026-07-04T23:58:13.971230+00:00"},{"alias_kind":"pith_short_8","alias_value":"EVXPABNV","created_at":"2026-07-04T23:58:13.971230+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/EVXPABNV2ESBAMSEBQDENXOOLB","json":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB.json","graph_json":"https://pith.science/api/pith-number/EVXPABNV2ESBAMSEBQDENXOOLB/graph.json","events_json":"https://pith.science/api/pith-number/EVXPABNV2ESBAMSEBQDENXOOLB/events.json","paper":"https://pith.science/paper/EVXPABNV"},"agent_actions":{"view_html":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB","download_json":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB.json","view_paper":"https://pith.science/paper/EVXPABNV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1908.06260&json=true","fetch_graph":"https://pith.science/api/pith-number/EVXPABNV2ESBAMSEBQDENXOOLB/graph.json","fetch_events":"https://pith.science/api/pith-number/EVXPABNV2ESBAMSEBQDENXOOLB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB/action/storage_attestation","attest_author":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB/action/author_attestation","sign_citation":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB/action/citation_signature","submit_replication":"https://pith.science/pith/EVXPABNV2ESBAMSEBQDENXOOLB/action/replication_record"}},"created_at":"2026-07-04T23:58:13.971230+00:00","updated_at":"2026-07-04T23:58:13.971230+00:00"}