{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:INS4WPCMJ2SAJDXO4YN6LRQ7FX","short_pith_number":"pith:INS4WPCM","canonical_record":{"source":{"id":"1010.1780","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-10-08T20:49:30Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"a77368898a1e3d7e051a89cd4597c1a50f9833a25edf687734ef077c155a1dbf","abstract_canon_sha256":"d7197703e80cf8592b82265386211176d023f1f53892199035fce39598b52e10"},"schema_version":"1.0"},"canonical_sha256":"4365cb3c4c4ea4048eeee61be5c61f2dc9a9afe02fc4482b756a79338e580584","source":{"kind":"arxiv","id":"1010.1780","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1780","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1780v2","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1780","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"pith_short_12","alias_value":"INS4WPCMJ2SA","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"INS4WPCMJ2SAJDXO","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"INS4WPCM","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:INS4WPCMJ2SAJDXO4YN6LRQ7FX","target":"record","payload":{"canonical_record":{"source":{"id":"1010.1780","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-10-08T20:49:30Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"a77368898a1e3d7e051a89cd4597c1a50f9833a25edf687734ef077c155a1dbf","abstract_canon_sha256":"d7197703e80cf8592b82265386211176d023f1f53892199035fce39598b52e10"},"schema_version":"1.0"},"canonical_sha256":"4365cb3c4c4ea4048eeee61be5c61f2dc9a9afe02fc4482b756a79338e580584","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:52.935849Z","signature_b64":"pApEJAaIxJ5OVnSQAqBgRf5XQKKqalcBHlHNsMEKeY48yz798PQVRHxPUBPLDFmhfE+iDT2aknYUMz1K55KsDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4365cb3c4c4ea4048eeee61be5c61f2dc9a9afe02fc4482b756a79338e580584","last_reissued_at":"2026-05-18T04:21:52.935352Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:52.935352Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1010.1780","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":"2026-05-18T04:21:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UzfKhUeyWTtMi+K2jiWJ9nbz72gOSsqizfrrNA07gWmVbgrVQlJ+/7eeUnfDUExzGfZ3+5QspR5y2ibiMfYVAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T10:34:02.097644Z"},"content_sha256":"2c7645f30cd57a1fd741617856d51e6683d0f841afb8e2addcc7d49e6c8b1d87","schema_version":"1.0","event_id":"sha256:2c7645f30cd57a1fd741617856d51e6683d0f841afb8e2addcc7d49e6c8b1d87"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:INS4WPCMJ2SAJDXO4YN6LRQ7FX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmic Acceleration and the Helicity-0 Graviton","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"hep-th","authors_text":"Claudia de Rham, David Pirtskhalava, Gregory Gabadadze, Lavinia Heisenberg","submitted_at":"2010-10-08T20:49:30Z","abstract_excerpt":"We explore cosmology in the decoupling limit of a non-linear covariant extension of Fierz-Pauli massive gravity obtained recently in arXiv:1007.0443. In this limit the theory is a scalar-tensor model of a unique form defined by symmetries. We find that it admits a self-accelerated solution, with the Hubble parameter set by the graviton mass. The negative pressure causing the acceleration is due to a condensate of the helicity-0 component of the massive graviton, and the background evolution, in the approximation used, is indistinguishable from the \\Lambda CDM model. Fluctuations about the self"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1780","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":""},"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":"2026-05-18T04:21:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1q1mKajD8K5bRQBl5f9fT6H8K4BJDLQXsAJr3Oi5oHNbngYwuQh2BXkjx31PNUJgDVF2gZwBZNUZ1EdwO49CAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T10:34:02.098221Z"},"content_sha256":"30be7de2e684215090f37e0f21c430522c969df09ca45f8f39c224a509cc9b2b","schema_version":"1.0","event_id":"sha256:30be7de2e684215090f37e0f21c430522c969df09ca45f8f39c224a509cc9b2b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/INS4WPCMJ2SAJDXO4YN6LRQ7FX/bundle.json","state_url":"https://pith.science/pith/INS4WPCMJ2SAJDXO4YN6LRQ7FX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/INS4WPCMJ2SAJDXO4YN6LRQ7FX/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":"2026-06-07T10:34:02Z","links":{"resolver":"https://pith.science/pith/INS4WPCMJ2SAJDXO4YN6LRQ7FX","bundle":"https://pith.science/pith/INS4WPCMJ2SAJDXO4YN6LRQ7FX/bundle.json","state":"https://pith.science/pith/INS4WPCMJ2SAJDXO4YN6LRQ7FX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/INS4WPCMJ2SAJDXO4YN6LRQ7FX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:INS4WPCMJ2SAJDXO4YN6LRQ7FX","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":"d7197703e80cf8592b82265386211176d023f1f53892199035fce39598b52e10","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-10-08T20:49:30Z","title_canon_sha256":"a77368898a1e3d7e051a89cd4597c1a50f9833a25edf687734ef077c155a1dbf"},"schema_version":"1.0","source":{"id":"1010.1780","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1780","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1780v2","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1780","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"pith_short_12","alias_value":"INS4WPCMJ2SA","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"INS4WPCMJ2SAJDXO","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"INS4WPCM","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:30be7de2e684215090f37e0f21c430522c969df09ca45f8f39c224a509cc9b2b","target":"graph","created_at":"2026-05-18T04:21:52Z","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 explore cosmology in the decoupling limit of a non-linear covariant extension of Fierz-Pauli massive gravity obtained recently in arXiv:1007.0443. In this limit the theory is a scalar-tensor model of a unique form defined by symmetries. We find that it admits a self-accelerated solution, with the Hubble parameter set by the graviton mass. The negative pressure causing the acceleration is due to a condensate of the helicity-0 component of the massive graviton, and the background evolution, in the approximation used, is indistinguishable from the \\Lambda CDM model. Fluctuations about the self","authors_text":"Claudia de Rham, David Pirtskhalava, Gregory Gabadadze, Lavinia Heisenberg","cross_cats":["astro-ph.CO","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-10-08T20:49:30Z","title":"Cosmic Acceleration and the Helicity-0 Graviton"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1780","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":"sha256:2c7645f30cd57a1fd741617856d51e6683d0f841afb8e2addcc7d49e6c8b1d87","target":"record","created_at":"2026-05-18T04:21:52Z","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":"d7197703e80cf8592b82265386211176d023f1f53892199035fce39598b52e10","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-10-08T20:49:30Z","title_canon_sha256":"a77368898a1e3d7e051a89cd4597c1a50f9833a25edf687734ef077c155a1dbf"},"schema_version":"1.0","source":{"id":"1010.1780","kind":"arxiv","version":2}},"canonical_sha256":"4365cb3c4c4ea4048eeee61be5c61f2dc9a9afe02fc4482b756a79338e580584","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4365cb3c4c4ea4048eeee61be5c61f2dc9a9afe02fc4482b756a79338e580584","first_computed_at":"2026-05-18T04:21:52.935352Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:52.935352Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pApEJAaIxJ5OVnSQAqBgRf5XQKKqalcBHlHNsMEKeY48yz798PQVRHxPUBPLDFmhfE+iDT2aknYUMz1K55KsDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:52.935849Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.1780","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c7645f30cd57a1fd741617856d51e6683d0f841afb8e2addcc7d49e6c8b1d87","sha256:30be7de2e684215090f37e0f21c430522c969df09ca45f8f39c224a509cc9b2b"],"state_sha256":"c281a3ccf5d29262b5d3c20c95eca366a174fc43598d41e634f3ea484b63241f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T9VjHGD4IA45nCOtXOP6YeFxHrMIXssXxpRD8vhIdzxsCIaUlunODIDwcuKbYtNRHfRghQHGtof97RCYLLeeBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T10:34:02.101278Z","bundle_sha256":"626c7c856489898c8ef15a638b564bd477e37222e6403e715795bf5e01cabe1b"}}