{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:AFJTOLL6234QGV5A3MS5NO6IBH","short_pith_number":"pith:AFJTOLL6","canonical_record":{"source":{"id":"2112.04089","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-12-08T03:06:57Z","cross_cats_sorted":["astro-ph.HE","nucl-ex"],"title_canon_sha256":"ab49799ee1af32ede2499bc7684e59c51bbc4fa2ece34f9c10de0479a042f7b3","abstract_canon_sha256":"976861f09bf172fddd6131ff12e2b87d00cf02ce5e0983f76d90f21b6460db09"},"schema_version":"1.0"},"canonical_sha256":"0153372d7ed6f90357a0db25d6bbc809fccb6cf70a61dd9e59b15ffb00c102e9","source":{"kind":"arxiv","id":"2112.04089","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.04089","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"arxiv_version","alias_value":"2112.04089v2","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.04089","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"pith_short_12","alias_value":"AFJTOLL6234Q","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"pith_short_16","alias_value":"AFJTOLL6234QGV5A","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"pith_short_8","alias_value":"AFJTOLL6","created_at":"2026-07-05T03:53:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:AFJTOLL6234QGV5A3MS5NO6IBH","target":"record","payload":{"canonical_record":{"source":{"id":"2112.04089","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-12-08T03:06:57Z","cross_cats_sorted":["astro-ph.HE","nucl-ex"],"title_canon_sha256":"ab49799ee1af32ede2499bc7684e59c51bbc4fa2ece34f9c10de0479a042f7b3","abstract_canon_sha256":"976861f09bf172fddd6131ff12e2b87d00cf02ce5e0983f76d90f21b6460db09"},"schema_version":"1.0"},"canonical_sha256":"0153372d7ed6f90357a0db25d6bbc809fccb6cf70a61dd9e59b15ffb00c102e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:53:13.657929Z","signature_b64":"01oTUe4RDg534auVMXQ/86ZfWl4jj59hG/PTOXY3XGyVaWNV1d1a1gWVRCP0GIaJovhY0/RgqQ9l1ickbLv3Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0153372d7ed6f90357a0db25d6bbc809fccb6cf70a61dd9e59b15ffb00c102e9","last_reissued_at":"2026-07-05T03:53:13.657414Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:53:13.657414Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.04089","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:53:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"44nUCtEIYQuOXpsFdcLt/Lhd6HdR4iIw5mWpKE1SF+F50D0hxVW6mbFsgrvh43s2VYqidMHd68zkGQftoT63Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:26:20.487088Z"},"content_sha256":"c83a404c8ddeb462311a8bbf2694257540b556f088539ca6d1808959612e1432","schema_version":"1.0","event_id":"sha256:c83a404c8ddeb462311a8bbf2694257540b556f088539ca6d1808959612e1432"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:AFJTOLL6234QGV5A3MS5NO6IBH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Translating neutron star observations to nuclear symmetry energy via artificial neural networks","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE","nucl-ex"],"primary_cat":"nucl-th","authors_text":"Plamen G. Krastev (Harvard University)","submitted_at":"2021-12-08T03:06:57Z","abstract_excerpt":"One of the most significant challenges involved in efforts to understand the equation of state of dense neutron-rich matter is the uncertain density dependence of the nuclear symmetry energy. Because of its broad impact, pinning down the density dependence of the nuclear symmetry energy has been a longstanding goal of both nuclear physics and astrophysics. Recent observations of neutron stars, in both electromagnetic and gravitational-wave spectra, have already constrained significantly the nuclear symmetry energy at high densities. Training deep neural networks to learn a computationally effi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.04089","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2112.04089/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:53:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SYdfr5wYa0uiP6Sg0jewFOnZyvT7etK3G6PvjtoKHyOrWFOW2cZEIJ3189t/4XoM1seLcvYFM/IAy7sAThIJDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:26:20.487937Z"},"content_sha256":"c72a7063b6efdafe62a7139dc3f72fa8d841610cd6808f7d00572983f36267ed","schema_version":"1.0","event_id":"sha256:c72a7063b6efdafe62a7139dc3f72fa8d841610cd6808f7d00572983f36267ed"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AFJTOLL6234QGV5A3MS5NO6IBH/bundle.json","state_url":"https://pith.science/pith/AFJTOLL6234QGV5A3MS5NO6IBH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AFJTOLL6234QGV5A3MS5NO6IBH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-06T04:26:20Z","links":{"resolver":"https://pith.science/pith/AFJTOLL6234QGV5A3MS5NO6IBH","bundle":"https://pith.science/pith/AFJTOLL6234QGV5A3MS5NO6IBH/bundle.json","state":"https://pith.science/pith/AFJTOLL6234QGV5A3MS5NO6IBH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AFJTOLL6234QGV5A3MS5NO6IBH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:AFJTOLL6234QGV5A3MS5NO6IBH","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":"976861f09bf172fddd6131ff12e2b87d00cf02ce5e0983f76d90f21b6460db09","cross_cats_sorted":["astro-ph.HE","nucl-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-12-08T03:06:57Z","title_canon_sha256":"ab49799ee1af32ede2499bc7684e59c51bbc4fa2ece34f9c10de0479a042f7b3"},"schema_version":"1.0","source":{"id":"2112.04089","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.04089","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"arxiv_version","alias_value":"2112.04089v2","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.04089","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"pith_short_12","alias_value":"AFJTOLL6234Q","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"pith_short_16","alias_value":"AFJTOLL6234QGV5A","created_at":"2026-07-05T03:53:13Z"},{"alias_kind":"pith_short_8","alias_value":"AFJTOLL6","created_at":"2026-07-05T03:53:13Z"}],"graph_snapshots":[{"event_id":"sha256:c72a7063b6efdafe62a7139dc3f72fa8d841610cd6808f7d00572983f36267ed","target":"graph","created_at":"2026-07-05T03:53:13Z","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/2112.04089/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"One of the most significant challenges involved in efforts to understand the equation of state of dense neutron-rich matter is the uncertain density dependence of the nuclear symmetry energy. Because of its broad impact, pinning down the density dependence of the nuclear symmetry energy has been a longstanding goal of both nuclear physics and astrophysics. Recent observations of neutron stars, in both electromagnetic and gravitational-wave spectra, have already constrained significantly the nuclear symmetry energy at high densities. Training deep neural networks to learn a computationally effi","authors_text":"Plamen G. Krastev (Harvard University)","cross_cats":["astro-ph.HE","nucl-ex"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-12-08T03:06:57Z","title":"Translating neutron star observations to nuclear symmetry energy via artificial neural networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.04089","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:c83a404c8ddeb462311a8bbf2694257540b556f088539ca6d1808959612e1432","target":"record","created_at":"2026-07-05T03:53:13Z","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":"976861f09bf172fddd6131ff12e2b87d00cf02ce5e0983f76d90f21b6460db09","cross_cats_sorted":["astro-ph.HE","nucl-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-th","submitted_at":"2021-12-08T03:06:57Z","title_canon_sha256":"ab49799ee1af32ede2499bc7684e59c51bbc4fa2ece34f9c10de0479a042f7b3"},"schema_version":"1.0","source":{"id":"2112.04089","kind":"arxiv","version":2}},"canonical_sha256":"0153372d7ed6f90357a0db25d6bbc809fccb6cf70a61dd9e59b15ffb00c102e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0153372d7ed6f90357a0db25d6bbc809fccb6cf70a61dd9e59b15ffb00c102e9","first_computed_at":"2026-07-05T03:53:13.657414Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:53:13.657414Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"01oTUe4RDg534auVMXQ/86ZfWl4jj59hG/PTOXY3XGyVaWNV1d1a1gWVRCP0GIaJovhY0/RgqQ9l1ickbLv3Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:53:13.657929Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.04089","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c83a404c8ddeb462311a8bbf2694257540b556f088539ca6d1808959612e1432","sha256:c72a7063b6efdafe62a7139dc3f72fa8d841610cd6808f7d00572983f36267ed"],"state_sha256":"acbde2b4ee9bd0c53d4d1c615f07d6743a6bd83f30b99438a14184caa9e87efc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CwJKDrPExqXsW8BjHjunfXP68k9TBReXMHKVQafrCanZ8q1eOhhR/bgvroen5AGVxhnjzobsNKzWxA0CTFrpDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T04:26:20.493206Z","bundle_sha256":"7fdb4ecc50c1699525aaf5cc5295375c471fc4bebd88ffa7be05fc58742dbc34"}}