{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:EYPJ4QLJMUFUEWKVNUNO3VRGPN","short_pith_number":"pith:EYPJ4QLJ","canonical_record":{"source":{"id":"1101.4049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-01-20T23:27:19Z","cross_cats_sorted":[],"title_canon_sha256":"203fa39b8d46688fd1e6ac2e4d99800702a9842fe57e40d77e548ebb53866641","abstract_canon_sha256":"1844a674befa8118f8960b2d8bc72018610a76b2b908d07daf0cf219f174cd02"},"schema_version":"1.0"},"canonical_sha256":"261e9e4169650b4259556d1aedd6267b5e5e2d99538e4eca2c618418a7e0101b","source":{"kind":"arxiv","id":"1101.4049","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4049","created_at":"2026-05-18T04:22:11Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4049v1","created_at":"2026-05-18T04:22:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4049","created_at":"2026-05-18T04:22:11Z"},{"alias_kind":"pith_short_12","alias_value":"EYPJ4QLJMUFU","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EYPJ4QLJMUFUEWKV","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EYPJ4QLJ","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:EYPJ4QLJMUFUEWKVNUNO3VRGPN","target":"record","payload":{"canonical_record":{"source":{"id":"1101.4049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-01-20T23:27:19Z","cross_cats_sorted":[],"title_canon_sha256":"203fa39b8d46688fd1e6ac2e4d99800702a9842fe57e40d77e548ebb53866641","abstract_canon_sha256":"1844a674befa8118f8960b2d8bc72018610a76b2b908d07daf0cf219f174cd02"},"schema_version":"1.0"},"canonical_sha256":"261e9e4169650b4259556d1aedd6267b5e5e2d99538e4eca2c618418a7e0101b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:22:11.067881Z","signature_b64":"kAEshDwrQeLfycuq9HOBS5aVSWdLXU+27Ri/9XcU0KcKbrSnNoAW5PI45LOf3ZZv1LmkSTlpoqi1VgcCl2RACA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"261e9e4169650b4259556d1aedd6267b5e5e2d99538e4eca2c618418a7e0101b","last_reissued_at":"2026-05-18T04:22:11.067385Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:22:11.067385Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.4049","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":"2026-05-18T04:22:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JLGbp3ath9/zBJ8o3TbHMorZfI77Rlc9ggFqlFcOGhaiTgbPooMP3nP9sPin3L4/IWEPotVp+AgqDiVJ5J2jDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T16:42:20.570058Z"},"content_sha256":"87dd4d1f6aa613a7f9891bf771719191934dac427ad5b2ef588c70fd6dd1605f","schema_version":"1.0","event_id":"sha256:87dd4d1f6aa613a7f9891bf771719191934dac427ad5b2ef588c70fd6dd1605f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:EYPJ4QLJMUFUEWKVNUNO3VRGPN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmological constant in spinfoam cosmology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Carlo Rovelli, Eugenio Bianchi, Francesca Vidotto, Thomas Krajewski","submitted_at":"2011-01-20T23:27:19Z","abstract_excerpt":"We consider a simple modification of the amplitude defining the dynamics of loop quantum gravity, corresponding to the introduction of the cosmological constant, and possibly related to the SL(2,C)q extension of the theory recently considered by Fairbairn-Meusburger and Han. We show that in the context of spinfoam cosmology, this modification yields the de Sitter cosmological solution."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4049","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":"2026-05-18T04:22:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X6gO9yEjZ3C28eA/WX1EJXEeY5DbgZ1N8kbjjdv6UA1OskrG17QWkLQo2qF8NKSmt15rxuCfwx3DVqiuWUOFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T16:42:20.570419Z"},"content_sha256":"38750329a53e42499877c3f08ba9c7bcabae5b7cf7d67c637679c2e913779fc8","schema_version":"1.0","event_id":"sha256:38750329a53e42499877c3f08ba9c7bcabae5b7cf7d67c637679c2e913779fc8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EYPJ4QLJMUFUEWKVNUNO3VRGPN/bundle.json","state_url":"https://pith.science/pith/EYPJ4QLJMUFUEWKVNUNO3VRGPN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EYPJ4QLJMUFUEWKVNUNO3VRGPN/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":"2026-05-20T16:42:20Z","links":{"resolver":"https://pith.science/pith/EYPJ4QLJMUFUEWKVNUNO3VRGPN","bundle":"https://pith.science/pith/EYPJ4QLJMUFUEWKVNUNO3VRGPN/bundle.json","state":"https://pith.science/pith/EYPJ4QLJMUFUEWKVNUNO3VRGPN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EYPJ4QLJMUFUEWKVNUNO3VRGPN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:EYPJ4QLJMUFUEWKVNUNO3VRGPN","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":"1844a674befa8118f8960b2d8bc72018610a76b2b908d07daf0cf219f174cd02","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-01-20T23:27:19Z","title_canon_sha256":"203fa39b8d46688fd1e6ac2e4d99800702a9842fe57e40d77e548ebb53866641"},"schema_version":"1.0","source":{"id":"1101.4049","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4049","created_at":"2026-05-18T04:22:11Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4049v1","created_at":"2026-05-18T04:22:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4049","created_at":"2026-05-18T04:22:11Z"},{"alias_kind":"pith_short_12","alias_value":"EYPJ4QLJMUFU","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EYPJ4QLJMUFUEWKV","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EYPJ4QLJ","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:38750329a53e42499877c3f08ba9c7bcabae5b7cf7d67c637679c2e913779fc8","target":"graph","created_at":"2026-05-18T04:22:11Z","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"},"paper":{"abstract_excerpt":"We consider a simple modification of the amplitude defining the dynamics of loop quantum gravity, corresponding to the introduction of the cosmological constant, and possibly related to the SL(2,C)q extension of the theory recently considered by Fairbairn-Meusburger and Han. We show that in the context of spinfoam cosmology, this modification yields the de Sitter cosmological solution.","authors_text":"Carlo Rovelli, Eugenio Bianchi, Francesca Vidotto, Thomas Krajewski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-01-20T23:27:19Z","title":"Cosmological constant in spinfoam cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4049","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":"sha256:87dd4d1f6aa613a7f9891bf771719191934dac427ad5b2ef588c70fd6dd1605f","target":"record","created_at":"2026-05-18T04:22:11Z","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":"1844a674befa8118f8960b2d8bc72018610a76b2b908d07daf0cf219f174cd02","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-01-20T23:27:19Z","title_canon_sha256":"203fa39b8d46688fd1e6ac2e4d99800702a9842fe57e40d77e548ebb53866641"},"schema_version":"1.0","source":{"id":"1101.4049","kind":"arxiv","version":1}},"canonical_sha256":"261e9e4169650b4259556d1aedd6267b5e5e2d99538e4eca2c618418a7e0101b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"261e9e4169650b4259556d1aedd6267b5e5e2d99538e4eca2c618418a7e0101b","first_computed_at":"2026-05-18T04:22:11.067385Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:22:11.067385Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kAEshDwrQeLfycuq9HOBS5aVSWdLXU+27Ri/9XcU0KcKbrSnNoAW5PI45LOf3ZZv1LmkSTlpoqi1VgcCl2RACA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:22:11.067881Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.4049","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87dd4d1f6aa613a7f9891bf771719191934dac427ad5b2ef588c70fd6dd1605f","sha256:38750329a53e42499877c3f08ba9c7bcabae5b7cf7d67c637679c2e913779fc8"],"state_sha256":"46fd1f90dab66b54363a1e769cc6f99500670945004727fede0dc12c543321ae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lPViKWLlHumtsP5q33Gydy4qq3keBzlE5SaSDx0jjuBnsX3PEf8Z/Ebb71Fqs5/aCoX4iAnDwVJffjgoTAbWDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T16:42:20.572871Z","bundle_sha256":"4bf2ac222607af805217f87e2aed760dcb765d9accd8443a7fcce14d56245153"}}