{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:JIHAJDMJL3GAPXXHPXHLGGCOIN","short_pith_number":"pith:JIHAJDMJ","canonical_record":{"source":{"id":"2307.05673","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-07-11T18:00:02Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"26f34f8696214491bcb8b1c560a4980eed65dcf13b6e721d4050ef960bd8195b","abstract_canon_sha256":"316ea0fc4a126f9051d5c87f5d3e9c93b959f13a97617f22492a06ea5a18b825"},"schema_version":"1.0"},"canonical_sha256":"4a0e048d895ecc07dee77dceb3184e4359a1d614c97e2b89f5f195054936dbd2","source":{"kind":"arxiv","id":"2307.05673","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.05673","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"arxiv_version","alias_value":"2307.05673v2","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.05673","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"pith_short_12","alias_value":"JIHAJDMJL3GA","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"pith_short_16","alias_value":"JIHAJDMJL3GAPXXH","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"pith_short_8","alias_value":"JIHAJDMJ","created_at":"2026-07-05T10:03:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:JIHAJDMJL3GAPXXHPXHLGGCOIN","target":"record","payload":{"canonical_record":{"source":{"id":"2307.05673","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-07-11T18:00:02Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"26f34f8696214491bcb8b1c560a4980eed65dcf13b6e721d4050ef960bd8195b","abstract_canon_sha256":"316ea0fc4a126f9051d5c87f5d3e9c93b959f13a97617f22492a06ea5a18b825"},"schema_version":"1.0"},"canonical_sha256":"4a0e048d895ecc07dee77dceb3184e4359a1d614c97e2b89f5f195054936dbd2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:03:39.198117Z","signature_b64":"C3rIMmZAMrub/mnZH8my5IlUTBzA3md0JKTs3qABXTQNArW45Ng3e3MNpNBIFnjDhTELOBwSexdMOJfBFrdDCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a0e048d895ecc07dee77dceb3184e4359a1d614c97e2b89f5f195054936dbd2","last_reissued_at":"2026-07-05T10:03:39.197677Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:03:39.197677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.05673","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:03:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AuujRQKnzRkAWSYr3+KSrCIpqmfGKTgeAIDZneIxILtIeRPIWxhx5+fUyw9tDzrGzkYVYa9wPLkZymG9l0qIDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T08:23:20.552886Z"},"content_sha256":"1698822f3994d19a8ef90f6dbffd1aa32c2424edd665d1a25fb1cf32efc2b500","schema_version":"1.0","event_id":"sha256:1698822f3994d19a8ef90f6dbffd1aa32c2424edd665d1a25fb1cf32efc2b500"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:JIHAJDMJL3GAPXXHPXHLGGCOIN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bimetric Starobinsky model","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Ioannis D. Gialamas, Kyriakos Tamvakis","submitted_at":"2023-07-11T18:00:02Z","abstract_excerpt":"The bimetric theory of gravity is an extension of general relativity that describes a massive spin-$2$ particle in addition to the standard massless graviton. The theory is based on two dynamical metric tensors with their interactions constrained by requiring the absence of the so-called Boulware-Deser ghost. It has been realized that the quantum interactions of matter fields with gravity are bound to generate modifications to the standard Einstein-Hilbert action such as quadratic curvature terms. Such a quadratic Ricci scalar term is present in the so-called Starobinsky model which has been p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.05673","kind":"arxiv","version":2},"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/2307.05673/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":"2026-07-05T10:03:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fllpty1w/Q9u0rYZfoniqmzj3shc4j+fxbeif46BeIEtKxor166YVvW05FyMCX5hTFezOv5aqcH693Qz2DxsAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T08:23:20.553380Z"},"content_sha256":"f5ccb1c046401c6b45c2fd1e58032e7708d3c9bca4ddd73c115d27eedc0682f8","schema_version":"1.0","event_id":"sha256:f5ccb1c046401c6b45c2fd1e58032e7708d3c9bca4ddd73c115d27eedc0682f8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JIHAJDMJL3GAPXXHPXHLGGCOIN/bundle.json","state_url":"https://pith.science/pith/JIHAJDMJL3GAPXXHPXHLGGCOIN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JIHAJDMJL3GAPXXHPXHLGGCOIN/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":"2026-08-11T08:23:20Z","links":{"resolver":"https://pith.science/pith/JIHAJDMJL3GAPXXHPXHLGGCOIN","bundle":"https://pith.science/pith/JIHAJDMJL3GAPXXHPXHLGGCOIN/bundle.json","state":"https://pith.science/pith/JIHAJDMJL3GAPXXHPXHLGGCOIN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JIHAJDMJL3GAPXXHPXHLGGCOIN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:JIHAJDMJL3GAPXXHPXHLGGCOIN","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":"316ea0fc4a126f9051d5c87f5d3e9c93b959f13a97617f22492a06ea5a18b825","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-07-11T18:00:02Z","title_canon_sha256":"26f34f8696214491bcb8b1c560a4980eed65dcf13b6e721d4050ef960bd8195b"},"schema_version":"1.0","source":{"id":"2307.05673","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.05673","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"arxiv_version","alias_value":"2307.05673v2","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.05673","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"pith_short_12","alias_value":"JIHAJDMJL3GA","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"pith_short_16","alias_value":"JIHAJDMJL3GAPXXH","created_at":"2026-07-05T10:03:39Z"},{"alias_kind":"pith_short_8","alias_value":"JIHAJDMJ","created_at":"2026-07-05T10:03:39Z"}],"graph_snapshots":[{"event_id":"sha256:f5ccb1c046401c6b45c2fd1e58032e7708d3c9bca4ddd73c115d27eedc0682f8","target":"graph","created_at":"2026-07-05T10:03:39Z","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/2307.05673/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The bimetric theory of gravity is an extension of general relativity that describes a massive spin-$2$ particle in addition to the standard massless graviton. The theory is based on two dynamical metric tensors with their interactions constrained by requiring the absence of the so-called Boulware-Deser ghost. It has been realized that the quantum interactions of matter fields with gravity are bound to generate modifications to the standard Einstein-Hilbert action such as quadratic curvature terms. Such a quadratic Ricci scalar term is present in the so-called Starobinsky model which has been p","authors_text":"Ioannis D. Gialamas, Kyriakos Tamvakis","cross_cats":["astro-ph.CO","hep-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-07-11T18:00:02Z","title":"Bimetric Starobinsky model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.05673","kind":"arxiv","version":2},"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":"sha256:1698822f3994d19a8ef90f6dbffd1aa32c2424edd665d1a25fb1cf32efc2b500","target":"record","created_at":"2026-07-05T10:03:39Z","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":"316ea0fc4a126f9051d5c87f5d3e9c93b959f13a97617f22492a06ea5a18b825","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2023-07-11T18:00:02Z","title_canon_sha256":"26f34f8696214491bcb8b1c560a4980eed65dcf13b6e721d4050ef960bd8195b"},"schema_version":"1.0","source":{"id":"2307.05673","kind":"arxiv","version":2}},"canonical_sha256":"4a0e048d895ecc07dee77dceb3184e4359a1d614c97e2b89f5f195054936dbd2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a0e048d895ecc07dee77dceb3184e4359a1d614c97e2b89f5f195054936dbd2","first_computed_at":"2026-07-05T10:03:39.197677Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:03:39.197677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C3rIMmZAMrub/mnZH8my5IlUTBzA3md0JKTs3qABXTQNArW45Ng3e3MNpNBIFnjDhTELOBwSexdMOJfBFrdDCA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:03:39.198117Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.05673","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1698822f3994d19a8ef90f6dbffd1aa32c2424edd665d1a25fb1cf32efc2b500","sha256:f5ccb1c046401c6b45c2fd1e58032e7708d3c9bca4ddd73c115d27eedc0682f8"],"state_sha256":"77975c1deedd0cdc6b2a2038c3d3214b11284d3d5cce651f52b4b65dd10cb21a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IHs5f2x8X+YRBXigGbHogW4fNuyAmulsvwR9p5sRmImahs5ckDasUCva1P/Pv2DyxeMw/OIVQ/J1Y5S2dGcEBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T08:23:20.558916Z","bundle_sha256":"e932a294fa15060d0e1802b6b437834d19c5e2b315a892cc8af75fcf0526a2fe"}}