{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:CXLDHE22ZBSYD4I4B52QBEHCRF","short_pith_number":"pith:CXLDHE22","canonical_record":{"source":{"id":"0705.2388","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2007-05-16T16:03:25Z","cross_cats_sorted":[],"title_canon_sha256":"5dc3d50ec4f3f9b2dc06aa2924fae7903a4b556f1c32442a0664388fca72a56f","abstract_canon_sha256":"9925c2abdde60d72e213243ad2689ea7ce6793021a399446255e1d77516a87da"},"schema_version":"1.0"},"canonical_sha256":"15d633935ac86581f11c0f750090e2895da431bffec7d1dd140d6f8ae0d3c496","source":{"kind":"arxiv","id":"0705.2388","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0705.2388","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"arxiv_version","alias_value":"0705.2388v1","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0705.2388","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"pith_short_12","alias_value":"CXLDHE22ZBSY","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"pith_short_16","alias_value":"CXLDHE22ZBSYD4I4","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"pith_short_8","alias_value":"CXLDHE22","created_at":"2026-07-04T15:24:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:CXLDHE22ZBSYD4I4B52QBEHCRF","target":"record","payload":{"canonical_record":{"source":{"id":"0705.2388","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2007-05-16T16:03:25Z","cross_cats_sorted":[],"title_canon_sha256":"5dc3d50ec4f3f9b2dc06aa2924fae7903a4b556f1c32442a0664388fca72a56f","abstract_canon_sha256":"9925c2abdde60d72e213243ad2689ea7ce6793021a399446255e1d77516a87da"},"schema_version":"1.0"},"canonical_sha256":"15d633935ac86581f11c0f750090e2895da431bffec7d1dd140d6f8ae0d3c496","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:24:13.514459Z","signature_b64":"3B1v6AFGEY2IWP/w8pKls4xf9XvjSu5pV5Vc1MZ5hKMuVC/jClmqMn4tDtbSNmwVHAWKaclh/2C1ey2otcwHBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"15d633935ac86581f11c0f750090e2895da431bffec7d1dd140d6f8ae0d3c496","last_reissued_at":"2026-07-04T15:24:13.514028Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:24:13.514028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0705.2388","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":"2026-07-04T15:24:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kSroU/Ro8b99MjhGVpA+ED+NjnIRWnrzjS3zvpFBBtHnUEwejrZpOZqm1fF+RMcMMpLgAe/93GVcoySm1ieBBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T14:26:35.774738Z"},"content_sha256":"d07908929bd21becac32b1e6ed6e1938cd0f92395ddbcc0cd51c3899509710ec","schema_version":"1.0","event_id":"sha256:d07908929bd21becac32b1e6ed6e1938cd0f92395ddbcc0cd51c3899509710ec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:CXLDHE22ZBSYD4I4B52QBEHCRF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The loop-quantum-gravity vertex-amplitude","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Carlo Rovelli, Jonathan Engle, Roberto Pereira","submitted_at":"2007-05-16T16:03:25Z","abstract_excerpt":"Spinfoam theories are hoped to provide the dynamics of non-perturbative loop quantum gravity. But a number of their features remain elusive. The best studied one -the euclidean Barrett-Crane model- does not have the boundary state space needed for this, and there are recent indications that, consequently, it may fail to yield the correct low-energy $n$-point functions. These difficulties can be traced to the SO(4) -> SU(2) gauge fixing and the way certain second class constraints are imposed, arguably incorrectly, strongly. We present an alternative model, that can be derived as a bona fide qu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0705.2388","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/0705.2388/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":"2026-07-04T15:24:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rn5fSkHsvSNR+1F5CVHt8NrUaEvRIXjNQJd15zAQaOqk/jPz2eGmG7t4aPNhObbOAklow4E7SmXh/FO2dqZ2Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T14:26:35.775526Z"},"content_sha256":"c03733b9ff8ae4257282e983f00feff5964922743f7f1409e8e217ffc1afcb8e","schema_version":"1.0","event_id":"sha256:c03733b9ff8ae4257282e983f00feff5964922743f7f1409e8e217ffc1afcb8e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CXLDHE22ZBSYD4I4B52QBEHCRF/bundle.json","state_url":"https://pith.science/pith/CXLDHE22ZBSYD4I4B52QBEHCRF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CXLDHE22ZBSYD4I4B52QBEHCRF/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":"2026-08-14T14:26:35Z","links":{"resolver":"https://pith.science/pith/CXLDHE22ZBSYD4I4B52QBEHCRF","bundle":"https://pith.science/pith/CXLDHE22ZBSYD4I4B52QBEHCRF/bundle.json","state":"https://pith.science/pith/CXLDHE22ZBSYD4I4B52QBEHCRF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CXLDHE22ZBSYD4I4B52QBEHCRF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:CXLDHE22ZBSYD4I4B52QBEHCRF","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":"9925c2abdde60d72e213243ad2689ea7ce6793021a399446255e1d77516a87da","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2007-05-16T16:03:25Z","title_canon_sha256":"5dc3d50ec4f3f9b2dc06aa2924fae7903a4b556f1c32442a0664388fca72a56f"},"schema_version":"1.0","source":{"id":"0705.2388","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0705.2388","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"arxiv_version","alias_value":"0705.2388v1","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0705.2388","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"pith_short_12","alias_value":"CXLDHE22ZBSY","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"pith_short_16","alias_value":"CXLDHE22ZBSYD4I4","created_at":"2026-07-04T15:24:13Z"},{"alias_kind":"pith_short_8","alias_value":"CXLDHE22","created_at":"2026-07-04T15:24:13Z"}],"graph_snapshots":[{"event_id":"sha256:c03733b9ff8ae4257282e983f00feff5964922743f7f1409e8e217ffc1afcb8e","target":"graph","created_at":"2026-07-04T15:24:13Z","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/0705.2388/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Spinfoam theories are hoped to provide the dynamics of non-perturbative loop quantum gravity. But a number of their features remain elusive. The best studied one -the euclidean Barrett-Crane model- does not have the boundary state space needed for this, and there are recent indications that, consequently, it may fail to yield the correct low-energy $n$-point functions. These difficulties can be traced to the SO(4) -> SU(2) gauge fixing and the way certain second class constraints are imposed, arguably incorrectly, strongly. We present an alternative model, that can be derived as a bona fide qu","authors_text":"Carlo Rovelli, Jonathan Engle, Roberto Pereira","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2007-05-16T16:03:25Z","title":"The loop-quantum-gravity vertex-amplitude"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0705.2388","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:d07908929bd21becac32b1e6ed6e1938cd0f92395ddbcc0cd51c3899509710ec","target":"record","created_at":"2026-07-04T15:24:13Z","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":"9925c2abdde60d72e213243ad2689ea7ce6793021a399446255e1d77516a87da","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2007-05-16T16:03:25Z","title_canon_sha256":"5dc3d50ec4f3f9b2dc06aa2924fae7903a4b556f1c32442a0664388fca72a56f"},"schema_version":"1.0","source":{"id":"0705.2388","kind":"arxiv","version":1}},"canonical_sha256":"15d633935ac86581f11c0f750090e2895da431bffec7d1dd140d6f8ae0d3c496","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15d633935ac86581f11c0f750090e2895da431bffec7d1dd140d6f8ae0d3c496","first_computed_at":"2026-07-04T15:24:13.514028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:24:13.514028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3B1v6AFGEY2IWP/w8pKls4xf9XvjSu5pV5Vc1MZ5hKMuVC/jClmqMn4tDtbSNmwVHAWKaclh/2C1ey2otcwHBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:24:13.514459Z","signed_message":"canonical_sha256_bytes"},"source_id":"0705.2388","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d07908929bd21becac32b1e6ed6e1938cd0f92395ddbcc0cd51c3899509710ec","sha256:c03733b9ff8ae4257282e983f00feff5964922743f7f1409e8e217ffc1afcb8e"],"state_sha256":"9f6d248580fa2c64d00157f221db48bd42fc376174425c89d9af53bc2721caf4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pSE8VNSB7xo+qOQkWqjlj6VU4irtxGpBmoskBB4sRVoKbomsmTN9g1YsHQdpxUp9NRH85cUkuvMFhGQuIAHyDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T14:26:35.781069Z","bundle_sha256":"5a7a8c5f8174fd3afc89e6fade85e91d9bbf7982c0416139d8b190b62c7e8786"}}