{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:FNGBDMP4N2OLCUDYNG5MIWBQAN","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":"c76a9fe61b929fe2efc0b13cdfded12f96f63495e842f75989f5445ccdb4785c","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2022-07-02T14:33:36Z","title_canon_sha256":"421cb3531f31e254dfa24a35d9cb058f8618c9da5183c28ae13057d77fe901ba"},"schema_version":"1.0","source":{"id":"2207.00846","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.00846","created_at":"2026-07-05T05:50:43Z"},{"alias_kind":"arxiv_version","alias_value":"2207.00846v1","created_at":"2026-07-05T05:50:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.00846","created_at":"2026-07-05T05:50:43Z"},{"alias_kind":"pith_short_12","alias_value":"FNGBDMP4N2OL","created_at":"2026-07-05T05:50:43Z"},{"alias_kind":"pith_short_16","alias_value":"FNGBDMP4N2OLCUDY","created_at":"2026-07-05T05:50:43Z"},{"alias_kind":"pith_short_8","alias_value":"FNGBDMP4","created_at":"2026-07-05T05:50:43Z"}],"graph_snapshots":[{"event_id":"sha256:bf2dac5ce829846cae7e8b4cd98405f780c747f54f9b26a9c7e6264a31a729d0","target":"graph","created_at":"2026-07-05T05:50:43Z","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":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2207.00846/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Hawking's black hole area theorem can be tested by monitoring the evolution of a single black hole over time. Using current imaging observations of two supermassive black holes M87* and Sgr A* from the Event Horizon Telescope (EHT), we find their horizon area variation fractions are consistent with the prediction of the black hole area law at the $1\\,\\sigma$ confidence level. We point out that whether the black hole area law is valid or not could be determined by future high precision EHT observations of Sgr A*.","authors_text":"Deng Wang","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2022-07-02T14:33:36Z","title":"Testing the black hole area law with Event Horizon Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.00846","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:349c4ef0bfe878774de26f264ef66186d2f5979871d2367daf9bc54d8049bc6c","target":"record","created_at":"2026-07-05T05:50:43Z","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":"c76a9fe61b929fe2efc0b13cdfded12f96f63495e842f75989f5445ccdb4785c","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2022-07-02T14:33:36Z","title_canon_sha256":"421cb3531f31e254dfa24a35d9cb058f8618c9da5183c28ae13057d77fe901ba"},"schema_version":"1.0","source":{"id":"2207.00846","kind":"arxiv","version":1}},"canonical_sha256":"2b4c11b1fc6e9cb1507869bac458300349763c1bfe473efd27c09d27405cce57","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b4c11b1fc6e9cb1507869bac458300349763c1bfe473efd27c09d27405cce57","first_computed_at":"2026-07-05T05:50:43.467409Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:50:43.467409Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WjOUI2fpIGEFpEnvoZgOaGK3+rNYSrtyI1HA8pHJgRFpTTQ6ox6wiMeGqR6ozTL6UANmX2wkh0LMKDkl5NGdBA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:50:43.467937Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.00846","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:349c4ef0bfe878774de26f264ef66186d2f5979871d2367daf9bc54d8049bc6c","sha256:bf2dac5ce829846cae7e8b4cd98405f780c747f54f9b26a9c7e6264a31a729d0"],"state_sha256":"24f49a902c5c225f52a02f717d33e7a3e82ed220b9a95ea883987921941a6de4"}