{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:PMSVIEPPAIACAUQSBP7HH4PDQM","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"16e357f2d0aebb0c02e1fe8f214a01c22234e9da695fd2b95c1990b77d017421","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-11-30T13:43:55Z","title_canon_sha256":"198086fbe3dee36716756e4e665bcc2dee7f97a11638264b1c97c7105913c544"},"schema_version":"1.0","source":{"id":"2512.00890","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.00890","created_at":"2026-05-17T23:39:00Z"},{"alias_kind":"arxiv_version","alias_value":"2512.00890v3","created_at":"2026-05-17T23:39:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.00890","created_at":"2026-05-17T23:39:00Z"},{"alias_kind":"pith_short_12","alias_value":"PMSVIEPPAIAC","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"PMSVIEPPAIACAUQS","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"PMSVIEPP","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:ecd3eca935b0ca05017f6f578655568c094235a5b9548fe1f1e7a2c342ae4083","target":"graph","created_at":"2026-05-17T23:39:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"The q-metric provides a counterexample to the conjecture that all asymptotically flat, stationary, vacuum, and asymptotically algebraically special spacetimes have vanishing NP constants."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"That the Zipoy-Voorhees spacetime satisfies the definitions of asymptotic flatness and asymptotic algebraic speciality used in the prior conjecture, and that the explicit NP-constant calculations are free of derivation or coordinate-choice errors."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"The Zipoy-Voorhees q-metric has non-vanishing NP constants and serves as a counterexample showing that algebraic speciality is needed for vanishing NP constants in asymptotically flat stationary vacuum spacetimes."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"The q-metric provides a counterexample showing non-vanishing NP constants for asymptotically flat stationary vacuum spacetimes that are only asymptotically algebraically special."}],"snapshot_sha256":"86342ec26749456db3df00174cf9330fa905f82f1705dfb2d110006bca3203e3"},"formal_canon":{"evidence_count":1,"snapshot_sha256":"f19f450af1cefa70024e1ffe40f1059471257dbd44a34338887cabd8aaa0d5a8"},"paper":{"abstract_excerpt":"The purpose of this article is to compute the asymptotic charges of a vacuum solution to the Einstein field equations describing a naked singularity with a non-vanishing quadrupole moment, known in the literature as the Zipoy-Voorhees spacetime (q-metric). In addition to the well-known asymptotic quantities such as the Bondi-Sachs energy-momentum, the BMS charges and NP constants of this spacetime are computed. Explicit calculations of the latter are relatively scarce in the literature. Moreover, it has been proven that the NP constants of asymptotically flat, stationary, vacuum, and algebraic","authors_text":"Edgar Gasperin, Mariem Magdy","cross_cats":[],"headline":"The q-metric provides a counterexample showing non-vanishing NP constants for asymptotically flat stationary vacuum spacetimes that are only asymptotically algebraically special.","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-11-30T13:43:55Z","title":"Asymptotic charges of a quadrupolar naked singularity"},"references":{"count":51,"internal_anchors":0,"resolved_work":51,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"The gravitational-wave memory effect.Classical and Quantum Gravity, 27(8):084036, April 2010","work_id":"8577be0b-3709-4bd4-aa03-668b7be88575","year":2010},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"Hereditary effects in gravitational radiation.Phys","work_id":"311886ce-468b-41a2-a8ec-fabcf2ae7c95","year":1992},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":3,"title":"On BMS invariance of gravitational scattering.Journal of High Energy Physics, 2014(7), July 2014","work_id":"4b4f48c2-416b-45db-81f0-ef1bb9aebcfb","year":2014},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"BMS supertranslations and Weinberg’s soft graviton theorem.Journal of High Energy Physics, 2015(5), May 2015","work_id":"9ad5b9f8-20bd-47d5-ab77-a800ba6d4d4f","year":2015},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"Hadi Godazgar, Mahdi Godazgar, and Malcolm J. Perry. Asymptotic Gravitational Charges.Physical Review Letters, 125(10), September 2020","work_id":"8c936f08-c1bf-4f9d-9024-f42c2fc142a8","year":2020}],"snapshot_sha256":"0dc62952dd2d226eefa2636cd0df6cd906539095efe547600defa0d18adaa821"},"source":{"id":"2512.00890","kind":"arxiv","version":3},"verdict":{"created_at":"2026-05-17T02:59:16.977082Z","id":"027f5c23-7209-4dd9-8630-a943c7fb7007","model_set":{"reader":"grok-4.3"},"one_line_summary":"The Zipoy-Voorhees q-metric has non-vanishing NP constants and serves as a counterexample showing that algebraic speciality is needed for vanishing NP constants in asymptotically flat stationary vacuum spacetimes.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"The q-metric provides a counterexample showing non-vanishing NP constants for asymptotically flat stationary vacuum spacetimes that are only asymptotically algebraically special.","strongest_claim":"The q-metric provides a counterexample to the conjecture that all asymptotically flat, stationary, vacuum, and asymptotically algebraically special spacetimes have vanishing NP constants.","weakest_assumption":"That the Zipoy-Voorhees spacetime satisfies the definitions of asymptotic flatness and asymptotic algebraic speciality used in the prior conjecture, and that the explicit NP-constant calculations are free of derivation or coordinate-choice errors."}},"verdict_id":"027f5c23-7209-4dd9-8630-a943c7fb7007"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d1e7c3651b250e9ba95ba1427a672409ce81f02bced53a819d15d6c4532f60be","target":"record","created_at":"2026-05-17T23:39:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"16e357f2d0aebb0c02e1fe8f214a01c22234e9da695fd2b95c1990b77d017421","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-11-30T13:43:55Z","title_canon_sha256":"198086fbe3dee36716756e4e665bcc2dee7f97a11638264b1c97c7105913c544"},"schema_version":"1.0","source":{"id":"2512.00890","kind":"arxiv","version":3}},"canonical_sha256":"7b255411ef02002052120bfe73f1e38309314300e372fc45a6862dc75dccdc91","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7b255411ef02002052120bfe73f1e38309314300e372fc45a6862dc75dccdc91","first_computed_at":"2026-05-17T23:39:00.661294Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:00.661294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q9pLaAQ32zUfu7D8Io8tR04FCx0gO7P+3FuD6YmgKQubDN02Elsc1KIX/5pcLyHuCBB4rL5wisL/jj6gaMbMCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:00.662152Z","signed_message":"canonical_sha256_bytes"},"source_id":"2512.00890","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d1e7c3651b250e9ba95ba1427a672409ce81f02bced53a819d15d6c4532f60be","sha256:ecd3eca935b0ca05017f6f578655568c094235a5b9548fe1f1e7a2c342ae4083"],"state_sha256":"b0dbcf325da433f74e93274ceb119c485602435f2f40ce6ba377ff4e0ac0048f"}