{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:SB7MNIDW2CUMWGPCERSWNZTXGT","short_pith_number":"pith:SB7MNIDW","canonical_record":{"source":{"id":"2011.08814","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-11-17T18:22:58Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9cca4cfeb96ac2c41ee301fad4a0029f494a690881a3119e46dcec0477284dc2","abstract_canon_sha256":"a8bb5b01a8b902a0b056afb5196b1dcb20c477920b96bf9c81644ae2795db9a1"},"schema_version":"1.0"},"canonical_sha256":"907ec6a076d0a8cb19e2246566e67734ee5af06f7fb58985dd26c2b9e45c315a","source":{"kind":"arxiv","id":"2011.08814","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.08814","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"arxiv_version","alias_value":"2011.08814v3","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.08814","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"pith_short_12","alias_value":"SB7MNIDW2CUM","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"pith_short_16","alias_value":"SB7MNIDW2CUMWGPC","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"pith_short_8","alias_value":"SB7MNIDW","created_at":"2026-07-05T03:01:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:SB7MNIDW2CUMWGPCERSWNZTXGT","target":"record","payload":{"canonical_record":{"source":{"id":"2011.08814","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-11-17T18:22:58Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"9cca4cfeb96ac2c41ee301fad4a0029f494a690881a3119e46dcec0477284dc2","abstract_canon_sha256":"a8bb5b01a8b902a0b056afb5196b1dcb20c477920b96bf9c81644ae2795db9a1"},"schema_version":"1.0"},"canonical_sha256":"907ec6a076d0a8cb19e2246566e67734ee5af06f7fb58985dd26c2b9e45c315a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:01:11.040862Z","signature_b64":"VDA4vqzNsEtIDSaIb4rbBXKoyE/oRgSorKuW57pZvVTx1VB/S1rHNySgQ4TiohRRPn/KQMCsnYJejtdkBVAYCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"907ec6a076d0a8cb19e2246566e67734ee5af06f7fb58985dd26c2b9e45c315a","last_reissued_at":"2026-07-05T03:01:11.040421Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:01:11.040421Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.08814","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:01:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HGsP1DHMqrGkC2sOriP712mudpUP0tyUyvcFH5xjH20pOVmrdegUeJDCXo6YjR5r1M10TrpvK09vskTo6z/PBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T15:15:35.529484Z"},"content_sha256":"686a67b5a20a68a8c8ea1d42faea86f23a99a1fdcfc733fca551cd6c4ab5a75c","schema_version":"1.0","event_id":"sha256:686a67b5a20a68a8c8ea1d42faea86f23a99a1fdcfc733fca551cd6c4ab5a75c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:SB7MNIDW2CUMWGPCERSWNZTXGT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Islands and stretched horizon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"Yoshinori Matsuo","submitted_at":"2020-11-17T18:22:58Z","abstract_excerpt":"Recently it was proposed that the entanglement entropy of the Hawking radiation contains the information of a region including the interior of the event horizon, which is called \"island.\" In studies of the entanglement entropy of the Hawking radiation, the total system in the black hole geometry is separated into the Hawking radiation and black hole. In this paper, we study the entanglement entropy of the black hole in the asymptotically flat Schwarzschild spacetime. Consistency with the island rule for the Hawking radiation implies that the information of the black hole is located in a differ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.08814","kind":"arxiv","version":3},"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/2011.08814/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":"2026-07-05T03:01:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NkMETlXhMaega8JdaKtqRjD5l8rT60WRBoKia2yMiySFpGt0mENpbPGiHeeXLVl2DAbUAsUepVNUoYP0MbeWDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T15:15:35.530339Z"},"content_sha256":"2d90f4ba0146914a594d31fa448c5fa8e4415502697e66c7eb9cabf557a78cb5","schema_version":"1.0","event_id":"sha256:2d90f4ba0146914a594d31fa448c5fa8e4415502697e66c7eb9cabf557a78cb5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SB7MNIDW2CUMWGPCERSWNZTXGT/bundle.json","state_url":"https://pith.science/pith/SB7MNIDW2CUMWGPCERSWNZTXGT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SB7MNIDW2CUMWGPCERSWNZTXGT/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":"2026-08-05T15:15:35Z","links":{"resolver":"https://pith.science/pith/SB7MNIDW2CUMWGPCERSWNZTXGT","bundle":"https://pith.science/pith/SB7MNIDW2CUMWGPCERSWNZTXGT/bundle.json","state":"https://pith.science/pith/SB7MNIDW2CUMWGPCERSWNZTXGT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SB7MNIDW2CUMWGPCERSWNZTXGT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:SB7MNIDW2CUMWGPCERSWNZTXGT","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":"a8bb5b01a8b902a0b056afb5196b1dcb20c477920b96bf9c81644ae2795db9a1","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-11-17T18:22:58Z","title_canon_sha256":"9cca4cfeb96ac2c41ee301fad4a0029f494a690881a3119e46dcec0477284dc2"},"schema_version":"1.0","source":{"id":"2011.08814","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.08814","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"arxiv_version","alias_value":"2011.08814v3","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.08814","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"pith_short_12","alias_value":"SB7MNIDW2CUM","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"pith_short_16","alias_value":"SB7MNIDW2CUMWGPC","created_at":"2026-07-05T03:01:11Z"},{"alias_kind":"pith_short_8","alias_value":"SB7MNIDW","created_at":"2026-07-05T03:01:11Z"}],"graph_snapshots":[{"event_id":"sha256:2d90f4ba0146914a594d31fa448c5fa8e4415502697e66c7eb9cabf557a78cb5","target":"graph","created_at":"2026-07-05T03:01:11Z","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/2011.08814/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recently it was proposed that the entanglement entropy of the Hawking radiation contains the information of a region including the interior of the event horizon, which is called \"island.\" In studies of the entanglement entropy of the Hawking radiation, the total system in the black hole geometry is separated into the Hawking radiation and black hole. In this paper, we study the entanglement entropy of the black hole in the asymptotically flat Schwarzschild spacetime. Consistency with the island rule for the Hawking radiation implies that the information of the black hole is located in a differ","authors_text":"Yoshinori Matsuo","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-11-17T18:22:58Z","title":"Islands and stretched horizon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.08814","kind":"arxiv","version":3},"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":"sha256:686a67b5a20a68a8c8ea1d42faea86f23a99a1fdcfc733fca551cd6c4ab5a75c","target":"record","created_at":"2026-07-05T03:01:11Z","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":"a8bb5b01a8b902a0b056afb5196b1dcb20c477920b96bf9c81644ae2795db9a1","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-11-17T18:22:58Z","title_canon_sha256":"9cca4cfeb96ac2c41ee301fad4a0029f494a690881a3119e46dcec0477284dc2"},"schema_version":"1.0","source":{"id":"2011.08814","kind":"arxiv","version":3}},"canonical_sha256":"907ec6a076d0a8cb19e2246566e67734ee5af06f7fb58985dd26c2b9e45c315a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"907ec6a076d0a8cb19e2246566e67734ee5af06f7fb58985dd26c2b9e45c315a","first_computed_at":"2026-07-05T03:01:11.040421Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:01:11.040421Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VDA4vqzNsEtIDSaIb4rbBXKoyE/oRgSorKuW57pZvVTx1VB/S1rHNySgQ4TiohRRPn/KQMCsnYJejtdkBVAYCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:01:11.040862Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.08814","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:686a67b5a20a68a8c8ea1d42faea86f23a99a1fdcfc733fca551cd6c4ab5a75c","sha256:2d90f4ba0146914a594d31fa448c5fa8e4415502697e66c7eb9cabf557a78cb5"],"state_sha256":"51c1c9c577f04f2523073e49a7ec4905f9a545ec689639ed1db39fa6fb39ab05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mRX04dhG6pyszzvejuHOOGu8M+GnCMZfgJ1vvhQnmW52m1jKwXzvYmO0H/FCq7Gm1i+oQTFLIk+h1eP+y1TADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T15:15:35.535136Z","bundle_sha256":"6d92453b37ee4e893d7324a0a623ff8e5460493dc40513a30390c86d775b599d"}}