{"as_of":"2026-08-12T17:42:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:5d621a5f6861753b8c8a413fa19a2ddf8a285258f1211c87207d2570e8537100","coverage":[{"denominator":0,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":2,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":2,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-12T06:34:41.77262+00:00","state":"measured"},{"denominator":2,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":2,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-11T23:12:48.730631Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"arxiv_reference","source_observed_at":"2026-05-18T15:43:55.275007Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"2002.01770","last_updated":"2020-02-05T13:09:21Z","snapshot_observed_at":"2026-08-09T11:12:03.711351Z","submitted_at":"2020-02-05T13:09:21Z","title":"A toy model of hyperboloidal approach to quasinormal modes","version":1},"cited_work":{"arxiv_id":"2002.01770","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2002.01770","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"arXiv:2002.01770 (2020)","venue":null,"work_id":"0bfc3c6b-1527-47db-bc06-fe939ac698a7","year":2002},"citing_paper":{"arxiv_id":"2004.06434","last_updated":"2021-09-14T16:37:22Z","snapshot_observed_at":"2026-08-08T23:42:37.543060Z","submitted_at":"2020-04-14T11:48:35Z","title":"Pseudospectrum and black hole quasi-normal mode (in)stability","version":4},"reference_index":91,"source":"pdf_text","source_observed_at":"2026-05-18T15:43:54.726108Z"},"links":{"cited_paper":"/paper/2002.01770","citing_paper":"/paper/2004.06434"},"observation_digest":"sha256:45c3e586e45b4eb738f7b30b4c0243ed2363eb81509c02ae374bf3f18eae88be","observation_id":"77d5caf3-cc44-4e80-8402-05d4a7b096c1","resolution":{"observed_at":"2026-05-18T15:43:55.277984Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-12T06:34:41.77262+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-12T06:34:41.77262+00:00","source":"crossref"},{"observed_at":"2026-08-12T06:34:36.333875+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"2002.01770","last_updated":"2020-02-05T13:09:21Z","snapshot_observed_at":"2026-08-09T11:12:03.711351Z","submitted_at":"2020-02-05T13:09:21Z","title":"A toy model of hyperboloidal approach to quasinormal modes","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2002.01770","snapshot_observed_at":"2026-08-11T23:12:48.730631Z","title":"Acta Phys","venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2412.02793","last_updated":"2025-06-08T14:48:50Z","snapshot_observed_at":"2026-08-11T23:03:56.229539Z","submitted_at":"2024-12-03T19:43:58Z","title":"Quasi-normal mode expansions of black hole perturbations: a hyperboloidal Keldysh's approach","version":2},"reference_index":92,"source":"pdf_text","source_observed_at":"2026-08-11T23:12:48.730631Z"},"links":{"cited_paper":"/paper/2002.01770","citing_paper":"/paper/2412.02793"},"observation_digest":"sha256:af7cce8de51a99ac28bdd62f65272d1e04d6fa74e33cf943c462664f9facf0de","observation_id":"3eaac155-da17-4fc1-a94e-8bea65a9fe3b","resolution":{"observed_at":"2026-08-11T23:12:48.730631Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}}],"links":{"evidence":"/evidence","html":"/paper/2002.01770/citation-record","integrity":"/paper/2002.01770/integrity","json":"/paper/2002.01770/citation-record.json","paper":"/paper/2002.01770"},"outbound":[],"paper":{"arxiv_id":"2002.01770","last_updated":"2020-02-05T13:09:21Z","latest_version":1,"primary_category":"gr-qc","snapshot_observed_at":"2026-08-09T11:12:03.711351Z","submitted_at":"2020-02-05T13:09:21Z","title":"A toy model of hyperboloidal approach to quasinormal modes"},"reference_resolution":{"displayed":0,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":0,"verified_exact":0,"verified_fuzzy":0},"total_outbound_references":0},"refusal":"A citation records a reference. It does not transfer a finding from one paper to another.","schema":"pith.paper-citation-record.v1","standing_sources":[{"observed_at":"2026-08-12T06:34:41.77262+00:00","source":"crossref"},{"observed_at":"2026-08-12T06:34:36.333875+00:00","source":"retraction_watch"}],"thesis":"As of 12 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 2 inbound Pith citation observations for arXiv:2002.01770."}