{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1992:YKH4QRNQ22VHJWQLAGCHM2NGQT","short_pith_number":"pith:YKH4QRNQ","canonical_record":{"source":{"id":"hep-th/9203052","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1992-03-18T23:08:09Z","cross_cats_sorted":[],"title_canon_sha256":"de7134229e0c2a28ef2965f957cf26d6d5741d917cc7f37f0f93926c1456cc21","abstract_canon_sha256":"692d5c9a1dd7f19cc478f665f3f9e565004d1f50fa8d56b38c60264144562b15"},"schema_version":"1.0"},"canonical_sha256":"c28fc845b0d6aa74da0b01847669a684c22d0ce7425d6eff7846b77946081a53","source":{"kind":"arxiv","id":"hep-th/9203052","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9203052","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9203052v1","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9203052","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"pith_short_12","alias_value":"YKH4QRNQ22VH","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"YKH4QRNQ22VHJWQL","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"YKH4QRNQ","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1992:YKH4QRNQ22VHJWQLAGCHM2NGQT","target":"record","payload":{"canonical_record":{"source":{"id":"hep-th/9203052","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1992-03-18T23:08:09Z","cross_cats_sorted":[],"title_canon_sha256":"de7134229e0c2a28ef2965f957cf26d6d5741d917cc7f37f0f93926c1456cc21","abstract_canon_sha256":"692d5c9a1dd7f19cc478f665f3f9e565004d1f50fa8d56b38c60264144562b15"},"schema_version":"1.0"},"canonical_sha256":"c28fc845b0d6aa74da0b01847669a684c22d0ce7425d6eff7846b77946081a53","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:37:44.177792Z","signature_b64":"+ZES7QAlA/VfVdTasZO2LtK7y68heVgmU3AQNdunpY9oznUHfN+52CwspAFVrTxlN/O8PKfaYbGeYGNcVaseAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c28fc845b0d6aa74da0b01847669a684c22d0ce7425d6eff7846b77946081a53","last_reissued_at":"2026-05-18T04:37:44.177125Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:37:44.177125Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-th/9203052","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":"2026-05-18T04:37:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mEBgQ32ZxWpY/NaESwuuRSpAaYhqDTHT0dRVx0fYw2CimO6tLWUnuqI6hEW/sFNgMKn5ia1Y3CSrLv4+BgfECw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:03:48.429510Z"},"content_sha256":"0eee7bffd026494c384fd92f12a6f39e758e65f3eed344286d0f3602d826a028","schema_version":"1.0","event_id":"sha256:0eee7bffd026494c384fd92f12a6f39e758e65f3eed344286d0f3602d826a028"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1992:YKH4QRNQ22VHJWQLAGCHM2NGQT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evaporation of Two Dimensional Black Holes","license":"","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"S. W. Hawking","submitted_at":"1992-03-18T23:08:09Z","abstract_excerpt":"Callan, Giddings, Harvey and Strominger have proposed an interesting two dimensional model theory that allows one to consider black hole evaporation in the semi-classical approximation. They originally hoped the black hole would evaporate completely without a singularity. However, it has been shown that the semi-classical equations will give a singularity where the dilaton field reaches a certain critical value. Initially, it seems this singularity will be hidden inside a black hole. However, as the evaporation proceeds, the dilaton field on the horizon will approach the critical value but the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9203052","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":"2026-05-18T04:37:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KIk0s0PdjTDDYUXEwLhUYeKsvTlfEA/EUSdtIX0ijVU+SNU0rneki7nrIApsO0XrxHPWJGKb16TiqCaVxQxQBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:03:48.430119Z"},"content_sha256":"7ab18d9cc1d75ad64fe549c8264c6b1298f43d516a9c698cc98792934a567955","schema_version":"1.0","event_id":"sha256:7ab18d9cc1d75ad64fe549c8264c6b1298f43d516a9c698cc98792934a567955"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YKH4QRNQ22VHJWQLAGCHM2NGQT/bundle.json","state_url":"https://pith.science/pith/YKH4QRNQ22VHJWQLAGCHM2NGQT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YKH4QRNQ22VHJWQLAGCHM2NGQT/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":"2026-05-26T10:03:48Z","links":{"resolver":"https://pith.science/pith/YKH4QRNQ22VHJWQLAGCHM2NGQT","bundle":"https://pith.science/pith/YKH4QRNQ22VHJWQLAGCHM2NGQT/bundle.json","state":"https://pith.science/pith/YKH4QRNQ22VHJWQLAGCHM2NGQT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YKH4QRNQ22VHJWQLAGCHM2NGQT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1992:YKH4QRNQ22VHJWQLAGCHM2NGQT","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":"692d5c9a1dd7f19cc478f665f3f9e565004d1f50fa8d56b38c60264144562b15","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"1992-03-18T23:08:09Z","title_canon_sha256":"de7134229e0c2a28ef2965f957cf26d6d5741d917cc7f37f0f93926c1456cc21"},"schema_version":"1.0","source":{"id":"hep-th/9203052","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9203052","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9203052v1","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9203052","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"pith_short_12","alias_value":"YKH4QRNQ22VH","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"YKH4QRNQ22VHJWQL","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"YKH4QRNQ","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:7ab18d9cc1d75ad64fe549c8264c6b1298f43d516a9c698cc98792934a567955","target":"graph","created_at":"2026-05-18T04:37:44Z","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":"Callan, Giddings, Harvey and Strominger have proposed an interesting two dimensional model theory that allows one to consider black hole evaporation in the semi-classical approximation. They originally hoped the black hole would evaporate completely without a singularity. However, it has been shown that the semi-classical equations will give a singularity where the dilaton field reaches a certain critical value. Initially, it seems this singularity will be hidden inside a black hole. However, as the evaporation proceeds, the dilaton field on the horizon will approach the critical value but the","authors_text":"S. W. Hawking","cross_cats":[],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1992-03-18T23:08:09Z","title":"Evaporation of Two Dimensional Black Holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9203052","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":"sha256:0eee7bffd026494c384fd92f12a6f39e758e65f3eed344286d0f3602d826a028","target":"record","created_at":"2026-05-18T04:37:44Z","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":"692d5c9a1dd7f19cc478f665f3f9e565004d1f50fa8d56b38c60264144562b15","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"1992-03-18T23:08:09Z","title_canon_sha256":"de7134229e0c2a28ef2965f957cf26d6d5741d917cc7f37f0f93926c1456cc21"},"schema_version":"1.0","source":{"id":"hep-th/9203052","kind":"arxiv","version":1}},"canonical_sha256":"c28fc845b0d6aa74da0b01847669a684c22d0ce7425d6eff7846b77946081a53","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c28fc845b0d6aa74da0b01847669a684c22d0ce7425d6eff7846b77946081a53","first_computed_at":"2026-05-18T04:37:44.177125Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:37:44.177125Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+ZES7QAlA/VfVdTasZO2LtK7y68heVgmU3AQNdunpY9oznUHfN+52CwspAFVrTxlN/O8PKfaYbGeYGNcVaseAw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:37:44.177792Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9203052","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0eee7bffd026494c384fd92f12a6f39e758e65f3eed344286d0f3602d826a028","sha256:7ab18d9cc1d75ad64fe549c8264c6b1298f43d516a9c698cc98792934a567955"],"state_sha256":"cd35c1665bf01b34cb9a2011ce09e39454ba69516667974e167738013865158d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ap61ppvMkFlpfDsiW3DqSR6wxFwEumA0SWCt4EHK7ItMyHU+bIUuqNSqpq4agaIePZICLbFWXxXLCJfLRmizDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T10:03:48.433226Z","bundle_sha256":"75be55253b52dbd0079d7ba419a57c9f0b0f5ec83a1d61d0f1a3f983ff2fce79"}}