{"as_of":"2026-08-16T17:42:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:29f54ee8b978eddbefcd2381e5384d6ce023610f7456336daf551b55375206e9","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":"2026-08-16T06:30:59.297886+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":"2026-08-14T14:08:14.734731Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"pith","source_observed_at":"2026-08-14T14:08:14.979673Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1804.00341","last_updated":"2020-12-28T02:00:30Z","snapshot_observed_at":"2026-08-14T19:30:17.616126Z","submitted_at":"2018-04-01T20:49:56Z","title":"Sparse Principal Component Analysis via Variable Projection","version":3},"cited_work":{"arxiv_id":"1804.00341","doi":null,"metadata_source":"pith","pith_arxiv_id":"1804.00341","snapshot_observed_at":"2026-08-14T14:08:14.979673Z","title":"Sparse Principal Component Analysis via Variable Projection","venue":"stat.ML","work_id":"14a58f4f-80e0-4ca0-99cd-b1aa07107533","year":2018},"citing_paper":{"arxiv_id":"1908.03717","last_updated":"2019-08-10T09:22:54Z","snapshot_observed_at":"2026-08-16T07:24:04.348703Z","submitted_at":"2019-08-10T09:22:54Z","title":"Separable nonlinear least-squares parameter estimation for complex dynamic systems","version":1},"reference_index":14,"source":"arxiv_source","source_observed_at":"2026-08-14T14:08:14.734731Z"},"links":{"cited_paper":"/paper/1804.00341","citing_paper":"/paper/1908.03717"},"observation_digest":"sha256:20d1a94f72092d0d5896bc09c09f332aa28aa3d91d66ba0bab07284ef1a5e2cb","observation_id":"eb60d23a-278b-4dda-a3ba-bfd280ce4df2","resolution":{"observed_at":"2026-08-14T14:08:14.985372Z","resolver_source":"local_arxiv","status":"metadata_mismatch"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/1804.00341/citation-record","integrity":"/paper/1804.00341/integrity","json":"/paper/1804.00341/citation-record.json","paper":"/paper/1804.00341"},"outbound":[],"paper":{"arxiv_id":"1804.00341","last_updated":"2020-12-28T02:00:30Z","latest_version":3,"primary_category":"stat.ML","snapshot_observed_at":"2026-08-14T19:30:17.616126Z","submitted_at":"2018-04-01T20:49:56Z","title":"Sparse Principal Component Analysis via Variable Projection"},"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":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"thesis":"As of 16 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 1 inbound Pith citation observation for arXiv:1804.00341."}