{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:LBHAVH3UAQXKDKJWZJWVGQYY4N","short_pith_number":"pith:LBHAVH3U","canonical_record":{"source":{"id":"0902.0190","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-02-02T02:34:51Z","cross_cats_sorted":[],"title_canon_sha256":"c1bd8e416531af926474a3dd83739526c7e2f00d85fe2d8e4a54344d4666c8b3","abstract_canon_sha256":"2aa688e6ffc024421f41d7f529ffb540bc4bb06ec39549be953b9e7b8ff160b2"},"schema_version":"1.0"},"canonical_sha256":"584e0a9f74042ea1a936ca6d534318e341aeaf751d56c5aaed4697c60af0640f","source":{"kind":"arxiv","id":"0902.0190","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.0190","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"arxiv_version","alias_value":"0902.0190v1","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.0190","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"pith_short_12","alias_value":"LBHAVH3UAQXK","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"pith_short_16","alias_value":"LBHAVH3UAQXKDKJW","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"pith_short_8","alias_value":"LBHAVH3U","created_at":"2026-07-04T15:37:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:LBHAVH3UAQXKDKJWZJWVGQYY4N","target":"record","payload":{"canonical_record":{"source":{"id":"0902.0190","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-02-02T02:34:51Z","cross_cats_sorted":[],"title_canon_sha256":"c1bd8e416531af926474a3dd83739526c7e2f00d85fe2d8e4a54344d4666c8b3","abstract_canon_sha256":"2aa688e6ffc024421f41d7f529ffb540bc4bb06ec39549be953b9e7b8ff160b2"},"schema_version":"1.0"},"canonical_sha256":"584e0a9f74042ea1a936ca6d534318e341aeaf751d56c5aaed4697c60af0640f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:37:12.140082Z","signature_b64":"b/3M2ZMuvyEQJomjcC1anc9YsBPe3mXk1t41IdElz1+iWlyyIo3kHdTgbhS/snA42v7HquhPFtOtqFlG5EnWCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"584e0a9f74042ea1a936ca6d534318e341aeaf751d56c5aaed4697c60af0640f","last_reissued_at":"2026-07-04T15:37:12.139746Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:37:12.139746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0902.0190","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":"2026-07-04T15:37:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B4IU3cjIgUQKxRlUlx4JGYrrbJ3Wamu5P4XdBYRJn02kf+FBem9y8GP58NBiYq47/Y6f3++XWaSXncN7Ag4YAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T18:37:13.694240Z"},"content_sha256":"491dacd47cec9c267db3f52cc814777906ff4a8df2b935963070396bc05dbf15","schema_version":"1.0","event_id":"sha256:491dacd47cec9c267db3f52cc814777906ff4a8df2b935963070396bc05dbf15"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:LBHAVH3UAQXKDKJWZJWVGQYY4N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum Gravity: Has Spacetime Quantum Properties?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Reiner Hedrich","submitted_at":"2009-02-02T02:34:51Z","abstract_excerpt":"The incompatibility between GR and QM is generally seen as a sufficient motivation for the development of a theory of Quantum Gravity. If - so a typical argumentation - QM gives a universally valid basis for the description of all natural systems, then the gravitational field should have quantum properties. Together with the arguments against semi-classical theories of gravity, this leads to a strategy which takes a quantization of GR as the natural avenue to Quantum Gravity. And a quantization of the gravitational field would in some sense correspond to a quantization of geometry. Spacetime w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.0190","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0902.0190/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":"2026-07-04T15:37:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"csl+rbvmVieAo9Lc4M6/CPMxFFUFc6io8x5DvN1qtVyyJH4JGYknovKle6/9U2exSHOPKUG84GSdkre7WhfyDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T18:37:13.695055Z"},"content_sha256":"aa98cb62ca53a27e4212894e468ba2a1fac586d4cadd9156cf8aa972a9ae4917","schema_version":"1.0","event_id":"sha256:aa98cb62ca53a27e4212894e468ba2a1fac586d4cadd9156cf8aa972a9ae4917"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LBHAVH3UAQXKDKJWZJWVGQYY4N/bundle.json","state_url":"https://pith.science/pith/LBHAVH3UAQXKDKJWZJWVGQYY4N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LBHAVH3UAQXKDKJWZJWVGQYY4N/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":"2026-08-09T18:37:13Z","links":{"resolver":"https://pith.science/pith/LBHAVH3UAQXKDKJWZJWVGQYY4N","bundle":"https://pith.science/pith/LBHAVH3UAQXKDKJWZJWVGQYY4N/bundle.json","state":"https://pith.science/pith/LBHAVH3UAQXKDKJWZJWVGQYY4N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LBHAVH3UAQXKDKJWZJWVGQYY4N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:LBHAVH3UAQXKDKJWZJWVGQYY4N","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":"2aa688e6ffc024421f41d7f529ffb540bc4bb06ec39549be953b9e7b8ff160b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-02-02T02:34:51Z","title_canon_sha256":"c1bd8e416531af926474a3dd83739526c7e2f00d85fe2d8e4a54344d4666c8b3"},"schema_version":"1.0","source":{"id":"0902.0190","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.0190","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"arxiv_version","alias_value":"0902.0190v1","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.0190","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"pith_short_12","alias_value":"LBHAVH3UAQXK","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"pith_short_16","alias_value":"LBHAVH3UAQXKDKJW","created_at":"2026-07-04T15:37:12Z"},{"alias_kind":"pith_short_8","alias_value":"LBHAVH3U","created_at":"2026-07-04T15:37:12Z"}],"graph_snapshots":[{"event_id":"sha256:aa98cb62ca53a27e4212894e468ba2a1fac586d4cadd9156cf8aa972a9ae4917","target":"graph","created_at":"2026-07-04T15:37:12Z","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/0902.0190/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The incompatibility between GR and QM is generally seen as a sufficient motivation for the development of a theory of Quantum Gravity. If - so a typical argumentation - QM gives a universally valid basis for the description of all natural systems, then the gravitational field should have quantum properties. Together with the arguments against semi-classical theories of gravity, this leads to a strategy which takes a quantization of GR as the natural avenue to Quantum Gravity. And a quantization of the gravitational field would in some sense correspond to a quantization of geometry. Spacetime w","authors_text":"Reiner Hedrich","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-02-02T02:34:51Z","title":"Quantum Gravity: Has Spacetime Quantum Properties?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.0190","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":"sha256:491dacd47cec9c267db3f52cc814777906ff4a8df2b935963070396bc05dbf15","target":"record","created_at":"2026-07-04T15:37:12Z","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":"2aa688e6ffc024421f41d7f529ffb540bc4bb06ec39549be953b9e7b8ff160b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2009-02-02T02:34:51Z","title_canon_sha256":"c1bd8e416531af926474a3dd83739526c7e2f00d85fe2d8e4a54344d4666c8b3"},"schema_version":"1.0","source":{"id":"0902.0190","kind":"arxiv","version":1}},"canonical_sha256":"584e0a9f74042ea1a936ca6d534318e341aeaf751d56c5aaed4697c60af0640f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"584e0a9f74042ea1a936ca6d534318e341aeaf751d56c5aaed4697c60af0640f","first_computed_at":"2026-07-04T15:37:12.139746Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:37:12.139746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b/3M2ZMuvyEQJomjcC1anc9YsBPe3mXk1t41IdElz1+iWlyyIo3kHdTgbhS/snA42v7HquhPFtOtqFlG5EnWCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:37:12.140082Z","signed_message":"canonical_sha256_bytes"},"source_id":"0902.0190","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:491dacd47cec9c267db3f52cc814777906ff4a8df2b935963070396bc05dbf15","sha256:aa98cb62ca53a27e4212894e468ba2a1fac586d4cadd9156cf8aa972a9ae4917"],"state_sha256":"6dfc400b2dcddc31adee7ce9aefc07a84687c622dcfa1bea378c645ef36c6914"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AQgSFmA0/9T4wH9kM1uDcJ+YhR2vkWzXlwyZQzeMD43AD4tptLdvIoAVBw8Nvh96fDcK8ohpeSlOFWdulRzUBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T18:37:13.700238Z","bundle_sha256":"d06216f835a6a1c9e0afccde56c0345e2071c5e6506c6c8199340676d62f744b"}}