{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ZXGHSOICBBZVYKY6A7NCTQFBXK","short_pith_number":"pith:ZXGHSOIC","canonical_record":{"source":{"id":"1904.02010","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-04-02T14:55:01Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"ae7280958e0ac59dfc7fc33beda7634158633a5e4c956110c41fa18902f29294","abstract_canon_sha256":"901479f103da897058e24848f27045ce7074f0fdc39b41e699859af64afaa7d4"},"schema_version":"1.0"},"canonical_sha256":"cdcc79390208735c2b1e07da29c0a1ba93c2a4d06dd582628f9baf15d356a390","source":{"kind":"arxiv","id":"1904.02010","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.02010","created_at":"2026-05-17T23:45:26Z"},{"alias_kind":"arxiv_version","alias_value":"1904.02010v1","created_at":"2026-05-17T23:45:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.02010","created_at":"2026-05-17T23:45:26Z"},{"alias_kind":"pith_short_12","alias_value":"ZXGHSOICBBZV","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZXGHSOICBBZVYKY6","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZXGHSOIC","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ZXGHSOICBBZVYKY6A7NCTQFBXK","target":"record","payload":{"canonical_record":{"source":{"id":"1904.02010","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-04-02T14:55:01Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"ae7280958e0ac59dfc7fc33beda7634158633a5e4c956110c41fa18902f29294","abstract_canon_sha256":"901479f103da897058e24848f27045ce7074f0fdc39b41e699859af64afaa7d4"},"schema_version":"1.0"},"canonical_sha256":"cdcc79390208735c2b1e07da29c0a1ba93c2a4d06dd582628f9baf15d356a390","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:26.968439Z","signature_b64":"bkmpvYwwrjMFUVWZHCJTPwUeqqcgjwLnDEym1t5gO1pyyFhshGKNNF38rOAvscY+O/VJtOYE79+bPKUUaAJiBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdcc79390208735c2b1e07da29c0a1ba93c2a4d06dd582628f9baf15d356a390","last_reissued_at":"2026-05-17T23:45:26.968015Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:26.968015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.02010","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:45:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RsuoVsZQ+86ToP9V+3f4p811zfrqh1msLEQf4FugiNhSCqLF72XqJ2Vh/ubUtPCzGfiBP0ZN+hHa235jtySeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T12:53:56.903360Z"},"content_sha256":"8092214c934f2760825c5fc245fb161f76d28a9ce6d8042328310f50e858a5cc","schema_version":"1.0","event_id":"sha256:8092214c934f2760825c5fc245fb161f76d28a9ce6d8042328310f50e858a5cc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ZXGHSOICBBZVYKY6A7NCTQFBXK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"\"Black holes ain't so black\": An introduction to the great discoveries of Stephen Hawking","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"physics.pop-ph","authors_text":"Jorge Pinochet","submitted_at":"2019-04-02T14:55:01Z","abstract_excerpt":"Between 1974 and 1975, Stephen Hawking revolutionized the world of physics by proposing that black holes have temperature, entropy, and evaporate gradually. The objective of this article is to offer a brief and updated introduction to these three remarkable results, employing only high school algebra and elementary physics. This article may be useful as pedagogical material in an introductory undergraduate physics course."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.02010","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-17T23:45:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gutk9EK2RidCadwIbmGhaRSXOeTsjEkSr4cgbkwdqZGUPuAUkO3ns1JuFRvKRHLwHFgU3TqVQBryU6VSG9yRBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T12:53:56.904095Z"},"content_sha256":"17714e3f3194b9efc228a7c57e2317fd07367d7ac10d2358cdc1a631d1db40a4","schema_version":"1.0","event_id":"sha256:17714e3f3194b9efc228a7c57e2317fd07367d7ac10d2358cdc1a631d1db40a4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZXGHSOICBBZVYKY6A7NCTQFBXK/bundle.json","state_url":"https://pith.science/pith/ZXGHSOICBBZVYKY6A7NCTQFBXK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZXGHSOICBBZVYKY6A7NCTQFBXK/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":"2026-06-10T12:53:56Z","links":{"resolver":"https://pith.science/pith/ZXGHSOICBBZVYKY6A7NCTQFBXK","bundle":"https://pith.science/pith/ZXGHSOICBBZVYKY6A7NCTQFBXK/bundle.json","state":"https://pith.science/pith/ZXGHSOICBBZVYKY6A7NCTQFBXK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZXGHSOICBBZVYKY6A7NCTQFBXK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ZXGHSOICBBZVYKY6A7NCTQFBXK","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":"901479f103da897058e24848f27045ce7074f0fdc39b41e699859af64afaa7d4","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-04-02T14:55:01Z","title_canon_sha256":"ae7280958e0ac59dfc7fc33beda7634158633a5e4c956110c41fa18902f29294"},"schema_version":"1.0","source":{"id":"1904.02010","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.02010","created_at":"2026-05-17T23:45:26Z"},{"alias_kind":"arxiv_version","alias_value":"1904.02010v1","created_at":"2026-05-17T23:45:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.02010","created_at":"2026-05-17T23:45:26Z"},{"alias_kind":"pith_short_12","alias_value":"ZXGHSOICBBZV","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZXGHSOICBBZVYKY6","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZXGHSOIC","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:17714e3f3194b9efc228a7c57e2317fd07367d7ac10d2358cdc1a631d1db40a4","target":"graph","created_at":"2026-05-17T23:45:26Z","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":"Between 1974 and 1975, Stephen Hawking revolutionized the world of physics by proposing that black holes have temperature, entropy, and evaporate gradually. The objective of this article is to offer a brief and updated introduction to these three remarkable results, employing only high school algebra and elementary physics. This article may be useful as pedagogical material in an introductory undergraduate physics course.","authors_text":"Jorge Pinochet","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-04-02T14:55:01Z","title":"\"Black holes ain't so black\": An introduction to the great discoveries of Stephen Hawking"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.02010","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":"sha256:8092214c934f2760825c5fc245fb161f76d28a9ce6d8042328310f50e858a5cc","target":"record","created_at":"2026-05-17T23:45:26Z","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":"901479f103da897058e24848f27045ce7074f0fdc39b41e699859af64afaa7d4","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2019-04-02T14:55:01Z","title_canon_sha256":"ae7280958e0ac59dfc7fc33beda7634158633a5e4c956110c41fa18902f29294"},"schema_version":"1.0","source":{"id":"1904.02010","kind":"arxiv","version":1}},"canonical_sha256":"cdcc79390208735c2b1e07da29c0a1ba93c2a4d06dd582628f9baf15d356a390","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdcc79390208735c2b1e07da29c0a1ba93c2a4d06dd582628f9baf15d356a390","first_computed_at":"2026-05-17T23:45:26.968015Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:26.968015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bkmpvYwwrjMFUVWZHCJTPwUeqqcgjwLnDEym1t5gO1pyyFhshGKNNF38rOAvscY+O/VJtOYE79+bPKUUaAJiBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:26.968439Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.02010","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8092214c934f2760825c5fc245fb161f76d28a9ce6d8042328310f50e858a5cc","sha256:17714e3f3194b9efc228a7c57e2317fd07367d7ac10d2358cdc1a631d1db40a4"],"state_sha256":"d2d9713da5254461234d561ed6663dd33af0c7c0612c07ab14fa1b4f639f785f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X89MqjiR3nPVCp5EWdrTVmWlBaWMRBhC7JtykozCU3FSceRGqggujMtdnzWYdHCNIfGognm6is42agWLMj2XDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T12:53:56.909669Z","bundle_sha256":"85168ebcc5edb8090705a6079e02beabe7d0cd3a4b3928cd224a64062a47e679"}}