{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:LM2VV547U3MGB4WS7BPZSWGQWV","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":"90de5381af6983df8550bb2c99a31e43fd03cd4b36438c5b5ff6e47383e3e356","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-29T12:06:28Z","title_canon_sha256":"2ef1220efbafde45c7e710355edeb9a0e5fbb106b7e6ad893690593cfdb2b565"},"schema_version":"1.0","source":{"id":"2605.31198","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.31198","created_at":"2026-06-01T01:04:03Z"},{"alias_kind":"arxiv_version","alias_value":"2605.31198v1","created_at":"2026-06-01T01:04:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.31198","created_at":"2026-06-01T01:04:03Z"},{"alias_kind":"pith_short_12","alias_value":"LM2VV547U3MG","created_at":"2026-06-01T01:04:03Z"},{"alias_kind":"pith_short_16","alias_value":"LM2VV547U3MGB4WS","created_at":"2026-06-01T01:04:03Z"},{"alias_kind":"pith_short_8","alias_value":"LM2VV547","created_at":"2026-06-01T01:04:03Z"}],"graph_snapshots":[{"event_id":"sha256:9ff4a6313bf69894492ecec09455a0228a03aae0713f6e1d4edfe2251715c092","target":"graph","created_at":"2026-06-01T01:04:03Z","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/2605.31198/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the first application, to the best of our knowledge, of Physics-Informed Neural Networks (PINNs) to the neutron star equation-of-state (EOS) inverse problem. Two interacting networks -- one representing the EOS $P(\\varepsilon)$ as a continuous, non-parametric function, the other solving the Tolman-Oppenheimer-Volkoff (TOV) equations -- are trained jointly on NICER X-ray timing posteriors and pulsar mass measurements. The TOV equations enter as a mean-square ODE residual enforced via automatic differentiation at every training step, rooted in the Neural Differential Equation framewor","authors_text":"Gabriel Bezerra, Rodrigo Negreiros, Veronica Dexheimer","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-29T12:06:28Z","title":"Neutron Star Equation of State via Physics Informed Neural Network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.31198","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":"sha256:9e9a4bc88c3caa6ad3d4cd8bac6d48a86fcff939215291aa215ce332ee9ce822","target":"record","created_at":"2026-06-01T01:04:03Z","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":"90de5381af6983df8550bb2c99a31e43fd03cd4b36438c5b5ff6e47383e3e356","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-29T12:06:28Z","title_canon_sha256":"2ef1220efbafde45c7e710355edeb9a0e5fbb106b7e6ad893690593cfdb2b565"},"schema_version":"1.0","source":{"id":"2605.31198","kind":"arxiv","version":1}},"canonical_sha256":"5b355af79fa6d860f2d2f85f9958d0b5694b87a086c7e7795c56cd9ca75bc80e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5b355af79fa6d860f2d2f85f9958d0b5694b87a086c7e7795c56cd9ca75bc80e","first_computed_at":"2026-06-01T01:04:03.493307Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-01T01:04:03.493307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GtHHqUAKeDNaU7/IkXkMoSi/Ec2GmWOVGdPhuuL4H1l3As3mXiDAFe6TTThddmrMi8Qs/Q4yrphE29BXi1h1DQ==","signature_status":"signed_v1","signed_at":"2026-06-01T01:04:03.493813Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.31198","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e9a4bc88c3caa6ad3d4cd8bac6d48a86fcff939215291aa215ce332ee9ce822","sha256:9ff4a6313bf69894492ecec09455a0228a03aae0713f6e1d4edfe2251715c092"],"state_sha256":"3187c29a23d0612135a78b8fe19e41781c054ea944d40640c419fec5672b7930"}