{"as_of":"2026-08-21T06:18:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:f8ece685731d80a0b7a7be157e87e3e79f969e1fa64db2c155e8419142acef89","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":1,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":1,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-20T06:33:59.587034+00:00","state":"measured"},{"denominator":1,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":1,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-01T13:08:05.149150Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"cited_works","source_observed_at":null,"state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1509.07347","last_updated":"2016-02-14T17:14:14Z","snapshot_observed_at":"2026-08-14T22:31:00.663565Z","submitted_at":"2015-09-24T12:57:12Z","title":"A brief introduction to Hilbert space frame theory and its applications","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1509.07347","snapshot_observed_at":"2026-08-01T13:08:05.149150Z","title":"Introduction to finite frame theory","venue":null,"work_id":null,"year":2013},"citing_paper":{"arxiv_id":"2607.19287","last_updated":"2026-07-21T16:58:41Z","snapshot_observed_at":"2026-08-20T14:31:27.545826Z","submitted_at":"2026-07-21T16:58:41Z","title":"A general estimation framework for continuous-variable systems","version":1},"reference_index":8,"source":"pdf_text","source_observed_at":"2026-08-01T13:08:05.149150Z"},"links":{"cited_paper":"/paper/1509.07347","citing_paper":"/paper/2607.19287"},"observation_digest":"sha256:e554f06b3359ebf09af7fe4d031cde26a46bcbff2782aa7c0ee60f1409f3b131","observation_id":"7991850d-0811-4452-8976-6ca728fbaaa9","resolution":{"observed_at":"2026-08-01T13:08:05.149150Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}}],"links":{"evidence":"/evidence","html":"/paper/1509.07347/citation-record","integrity":"/paper/1509.07347/integrity","json":"/paper/1509.07347/citation-record.json","paper":"/paper/1509.07347"},"outbound":[],"paper":{"arxiv_id":"1509.07347","last_updated":"2016-02-14T17:14:14Z","latest_version":2,"primary_category":"math.FA","snapshot_observed_at":"2026-08-14T22:31:00.663565Z","submitted_at":"2015-09-24T12:57:12Z","title":"A brief introduction to Hilbert space frame theory and its applications"},"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":"2026-08-20T06:33:59.587034+00:00","source":"crossref"},{"observed_at":"2026-08-20T06:33:54.927442+00:00","source":"retraction_watch"}],"thesis":"As of 21 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 1 inbound Pith citation observation for arXiv:1509.07347."}