{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LPVSS4EXSOIJYJRNNXI3OBJPGR","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":"0bf04982d9bf937e5fc80a008c6a3a9e5da62942a409ea96f6dad89379c766aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-11-23T18:26:05Z","title_canon_sha256":"9179d94f363e6a172b551cf030ad8e8a8930d37fab1158a6ac3423d0777f2e0e"},"schema_version":"1.0","source":{"id":"1811.09589","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.09589","created_at":"2026-05-17T23:53:41Z"},{"alias_kind":"arxiv_version","alias_value":"1811.09589v2","created_at":"2026-05-17T23:53:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.09589","created_at":"2026-05-17T23:53:41Z"},{"alias_kind":"pith_short_12","alias_value":"LPVSS4EXSOIJ","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LPVSS4EXSOIJYJRN","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LPVSS4EX","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:1c0c7604bc4086ba80b8257420cd5b270ef65eb7959780e08bccba8b72e4f541","target":"graph","created_at":"2026-05-17T23:53:41Z","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"},"paper":{"abstract_excerpt":"In this paper we used the theory of adiabatic radial oscillations developed by Chandrasekhar to study the conditions for dynamical stability of constant energy-density stars, or Schwarzschild stars, in the unstudied ultra compact regime beyond the Buchdahl limit, that is, for configurations with radius $R$ in the range $R_{\\rm S}<R<(9/8)R_{\\rm S}$, where $R_{\\rm S}$ is the Schwarzschild radius of the star. These recently found analytical solutions exhibit a negative pressure region in their centre and, in the limit when $R\\to R_{\\rm S}$, the full interior region of the star becomes filled with","authors_text":"Camilo Posada, Cecilia Chirenti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-11-23T18:26:05Z","title":"On the radial stability of ultra compact Schwarzschild stars beyond the Buchdahl limit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.09589","kind":"arxiv","version":2},"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":"sha256:5ede11c9d8ef6842bc342dcea6f912fa8a551ffd2786bb377121e55d79d7e7c3","target":"record","created_at":"2026-05-17T23:53:41Z","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":"0bf04982d9bf937e5fc80a008c6a3a9e5da62942a409ea96f6dad89379c766aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-11-23T18:26:05Z","title_canon_sha256":"9179d94f363e6a172b551cf030ad8e8a8930d37fab1158a6ac3423d0777f2e0e"},"schema_version":"1.0","source":{"id":"1811.09589","kind":"arxiv","version":2}},"canonical_sha256":"5beb29709793909c262d6dd1b7052f347a96ab684b908c0ffe12b23c916a3f95","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5beb29709793909c262d6dd1b7052f347a96ab684b908c0ffe12b23c916a3f95","first_computed_at":"2026-05-17T23:53:41.485812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:41.485812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TElbkcDKqV0Xvk+Q4WN8HIS3P+1nLufjP2AncgZSUeCyqA1VHVb1IIXYo5iOBDRFlZn4/yhryCr47ABGJhKcDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:41.486284Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.09589","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ede11c9d8ef6842bc342dcea6f912fa8a551ffd2786bb377121e55d79d7e7c3","sha256:1c0c7604bc4086ba80b8257420cd5b270ef65eb7959780e08bccba8b72e4f541"],"state_sha256":"adff6077ccecacf595567789de657dbe10c12b2a17ec975324b699edeb41c920"}