{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:RLHQTRNPYCPNHBVPNRVLL4LDPY","short_pith_number":"pith:RLHQTRNP","canonical_record":{"source":{"id":"1803.01838","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-03-05T18:59:14Z","cross_cats_sorted":[],"title_canon_sha256":"a56d74dca35eb2f1078ef7e8c3203c9c426af3257d380c1bc62fef5776e79f91","abstract_canon_sha256":"0f711ee991d047d133ae52b1efcc31e8a4484f49ce415baa53b0920b43427f2d"},"schema_version":"1.0"},"canonical_sha256":"8acf09c5afc09ed386af6c6ab5f1637e1be7699a7fabdf43c6b05e2294698f84","source":{"kind":"arxiv","id":"1803.01838","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.01838","created_at":"2026-05-18T00:17:38Z"},{"alias_kind":"arxiv_version","alias_value":"1803.01838v1","created_at":"2026-05-18T00:17:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.01838","created_at":"2026-05-18T00:17:38Z"},{"alias_kind":"pith_short_12","alias_value":"RLHQTRNPYCPN","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RLHQTRNPYCPNHBVP","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RLHQTRNP","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:RLHQTRNPYCPNHBVPNRVLL4LDPY","target":"record","payload":{"canonical_record":{"source":{"id":"1803.01838","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-03-05T18:59:14Z","cross_cats_sorted":[],"title_canon_sha256":"a56d74dca35eb2f1078ef7e8c3203c9c426af3257d380c1bc62fef5776e79f91","abstract_canon_sha256":"0f711ee991d047d133ae52b1efcc31e8a4484f49ce415baa53b0920b43427f2d"},"schema_version":"1.0"},"canonical_sha256":"8acf09c5afc09ed386af6c6ab5f1637e1be7699a7fabdf43c6b05e2294698f84","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:38.475150Z","signature_b64":"hfVPdh9vNi8vHL4C4DCqZVjx5xSRV855RKeghiIwoIZR43foaZA4t11ceCJ1TVOYYoyK0bYufmX1gia4jx/vCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8acf09c5afc09ed386af6c6ab5f1637e1be7699a7fabdf43c6b05e2294698f84","last_reissued_at":"2026-05-18T00:17:38.474592Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:38.474592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.01838","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":"2026-05-18T00:17:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bPe/BXucydkoZyPUcZHA5g+jAvL6HcobpmlTSNz75V0Nnw4QI3S2Lp5msqAPZmDg2innzzrG1ShrywwmT6KsCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T17:12:40.944369Z"},"content_sha256":"0b9aebf8d26d8959229e7fd641e517ef9a2a643620790cbcf2845d9310a3a11d","schema_version":"1.0","event_id":"sha256:0b9aebf8d26d8959229e7fd641e517ef9a2a643620790cbcf2845d9310a3a11d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:RLHQTRNPYCPNHBVPNRVLL4LDPY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deformation of the EPRL spin foam model by a cosmological constant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Benjamin Bahr, Giovanni Rabuffo","submitted_at":"2018-03-05T18:59:14Z","abstract_excerpt":"In this article, we consider an ad-hoc deformation of the EPRL model for quantum gravity by a cosmological constant term. This sort of deformation has been first introduced by Han for the case of the $4$-simplex. In this article, we generalise the deformation to the case of arbitrary vertices, and compute its large-$j$-asymptotics. We show that, if the boundary data corresponds to a $4d$ polyhedron $P$, then the asymptotic formula gives the usual Regge action plus a cosmological constant term. We pay particular attention to the determinant of the Hessian matrix, and show that it can be related"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.01838","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":"2026-05-18T00:17:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7cDxnLxr90opU1x0EEGBUg2E5EpTCs+76NNrqLaNcxP9AJqQ2oe2nhH9mQNDVqh55xoxXz+oL7usOJl9XIsHDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T17:12:40.945020Z"},"content_sha256":"da3b616e2c3507e2b73a89d9a906ec41a984e210f67d3547df02d1d09ad48b84","schema_version":"1.0","event_id":"sha256:da3b616e2c3507e2b73a89d9a906ec41a984e210f67d3547df02d1d09ad48b84"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RLHQTRNPYCPNHBVPNRVLL4LDPY/bundle.json","state_url":"https://pith.science/pith/RLHQTRNPYCPNHBVPNRVLL4LDPY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RLHQTRNPYCPNHBVPNRVLL4LDPY/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":"2026-06-06T17:12:40Z","links":{"resolver":"https://pith.science/pith/RLHQTRNPYCPNHBVPNRVLL4LDPY","bundle":"https://pith.science/pith/RLHQTRNPYCPNHBVPNRVLL4LDPY/bundle.json","state":"https://pith.science/pith/RLHQTRNPYCPNHBVPNRVLL4LDPY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RLHQTRNPYCPNHBVPNRVLL4LDPY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RLHQTRNPYCPNHBVPNRVLL4LDPY","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":"0f711ee991d047d133ae52b1efcc31e8a4484f49ce415baa53b0920b43427f2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-03-05T18:59:14Z","title_canon_sha256":"a56d74dca35eb2f1078ef7e8c3203c9c426af3257d380c1bc62fef5776e79f91"},"schema_version":"1.0","source":{"id":"1803.01838","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.01838","created_at":"2026-05-18T00:17:38Z"},{"alias_kind":"arxiv_version","alias_value":"1803.01838v1","created_at":"2026-05-18T00:17:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.01838","created_at":"2026-05-18T00:17:38Z"},{"alias_kind":"pith_short_12","alias_value":"RLHQTRNPYCPN","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RLHQTRNPYCPNHBVP","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RLHQTRNP","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:da3b616e2c3507e2b73a89d9a906ec41a984e210f67d3547df02d1d09ad48b84","target":"graph","created_at":"2026-05-18T00:17:38Z","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":"In this article, we consider an ad-hoc deformation of the EPRL model for quantum gravity by a cosmological constant term. This sort of deformation has been first introduced by Han for the case of the $4$-simplex. In this article, we generalise the deformation to the case of arbitrary vertices, and compute its large-$j$-asymptotics. We show that, if the boundary data corresponds to a $4d$ polyhedron $P$, then the asymptotic formula gives the usual Regge action plus a cosmological constant term. We pay particular attention to the determinant of the Hessian matrix, and show that it can be related","authors_text":"Benjamin Bahr, Giovanni Rabuffo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-03-05T18:59:14Z","title":"Deformation of the EPRL spin foam model by a cosmological constant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.01838","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":"sha256:0b9aebf8d26d8959229e7fd641e517ef9a2a643620790cbcf2845d9310a3a11d","target":"record","created_at":"2026-05-18T00:17:38Z","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":"0f711ee991d047d133ae52b1efcc31e8a4484f49ce415baa53b0920b43427f2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-03-05T18:59:14Z","title_canon_sha256":"a56d74dca35eb2f1078ef7e8c3203c9c426af3257d380c1bc62fef5776e79f91"},"schema_version":"1.0","source":{"id":"1803.01838","kind":"arxiv","version":1}},"canonical_sha256":"8acf09c5afc09ed386af6c6ab5f1637e1be7699a7fabdf43c6b05e2294698f84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8acf09c5afc09ed386af6c6ab5f1637e1be7699a7fabdf43c6b05e2294698f84","first_computed_at":"2026-05-18T00:17:38.474592Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:38.474592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hfVPdh9vNi8vHL4C4DCqZVjx5xSRV855RKeghiIwoIZR43foaZA4t11ceCJ1TVOYYoyK0bYufmX1gia4jx/vCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:38.475150Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.01838","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0b9aebf8d26d8959229e7fd641e517ef9a2a643620790cbcf2845d9310a3a11d","sha256:da3b616e2c3507e2b73a89d9a906ec41a984e210f67d3547df02d1d09ad48b84"],"state_sha256":"4eb6aa2cb61bd8c803f9aae31f546a5a56c7bec54cea3659eb3f780fa527251e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s6VilMLNY3n1Oog1bM/vBwEQOBQd9U9JiSllmOMjXDIpFaUT/5I5eIReur5XrbkkDdVgai7nfaJr2oi8tmoKCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T17:12:40.948625Z","bundle_sha256":"2ffdaa4760c2077b18ec9f2930246791312547e449649982e0157157a8ebd726"}}