{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:CBQTOIWVLCARXDKGB2R2MOS36T","short_pith_number":"pith:CBQTOIWV","canonical_record":{"source":{"id":"1109.3224","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-09-14T23:03:21Z","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"title_canon_sha256":"81b9545985f1a6389dbeb843005fbde4c3a3a53f04e477711b0ff5dbf6050ee7","abstract_canon_sha256":"0fe9aec9e37c484d6f6bd64545d2a730ad86694ecdff54ab9a70d52fa8e9b3a1"},"schema_version":"1.0"},"canonical_sha256":"10613722d558811b8d460ea3a63a5bf4c235cbe8bc7a7f0ae2229c2ae9684efe","source":{"kind":"arxiv","id":"1109.3224","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.3224","created_at":"2026-05-18T03:38:05Z"},{"alias_kind":"arxiv_version","alias_value":"1109.3224v2","created_at":"2026-05-18T03:38:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.3224","created_at":"2026-05-18T03:38:05Z"},{"alias_kind":"pith_short_12","alias_value":"CBQTOIWVLCAR","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CBQTOIWVLCARXDKG","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CBQTOIWV","created_at":"2026-05-18T12:26:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:CBQTOIWVLCARXDKGB2R2MOS36T","target":"record","payload":{"canonical_record":{"source":{"id":"1109.3224","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-09-14T23:03:21Z","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"title_canon_sha256":"81b9545985f1a6389dbeb843005fbde4c3a3a53f04e477711b0ff5dbf6050ee7","abstract_canon_sha256":"0fe9aec9e37c484d6f6bd64545d2a730ad86694ecdff54ab9a70d52fa8e9b3a1"},"schema_version":"1.0"},"canonical_sha256":"10613722d558811b8d460ea3a63a5bf4c235cbe8bc7a7f0ae2229c2ae9684efe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:05.140826Z","signature_b64":"BWs2w2TqKaUr5MBNrHM9xvYaWsVGqt19fLjlvE/ruMj93MDGbgNau7Ps5qbcbsW45Tm41P7nhUKk4Kj56H3bAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"10613722d558811b8d460ea3a63a5bf4c235cbe8bc7a7f0ae2229c2ae9684efe","last_reissued_at":"2026-05-18T03:38:05.140446Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:05.140446Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.3224","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":"2026-05-18T03:38:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BE/ktRSgI5fF2oXJIpo0E5wvZNnunLACXUv2BVtjQXsm1lNgAPDd2ZEdy2L3cIa6l2V7Bpz+/vpcC8J3ov0CDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T19:00:16.484826Z"},"content_sha256":"86e563c72520dd565772dbe695baa2b5a8285259a5df1142550be2c1ceb9fdd0","schema_version":"1.0","event_id":"sha256:86e563c72520dd565772dbe695baa2b5a8285259a5df1142550be2c1ceb9fdd0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:CBQTOIWVLCARXDKGB2R2MOS36T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bigravitational inflation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc","hep-ph"],"primary_cat":"hep-th","authors_text":"Gonzalo A. Palma, Luis E. Campusano, Vicente Atal","submitted_at":"2011-09-14T23:03:21Z","abstract_excerpt":"We study the realization of cosmic inflation in bigravity theories. By analyzing the evolution of scalar, vector, and tensor perturbations in de Sitter-like spacetimes, we find strong stability constraints on the class of viable vacua offered by these theories. More specifically, the only stable de Sitter vacua contain two nondecoupled gravitons (one of which is massive) with different maximal propagation speeds. We derive an effective theory for the massless graviton, which is found to propagate at an intermediate speed, limited by the two maximal values. For inflation, while the spectrum of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.3224","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":"2026-05-18T03:38:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xk1tlifM7ZP7BwyUlNnNZWKVuUCNFYTWiwGa2rVmd2J/Dgt9m5y1PnXxEXexUbK4/poHNX9NXoyLw5URQYDvDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T19:00:16.485182Z"},"content_sha256":"306ea8d76e1652f01201ceb19d3d7e3972927e3b23b9494980f09580b1914d36","schema_version":"1.0","event_id":"sha256:306ea8d76e1652f01201ceb19d3d7e3972927e3b23b9494980f09580b1914d36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CBQTOIWVLCARXDKGB2R2MOS36T/bundle.json","state_url":"https://pith.science/pith/CBQTOIWVLCARXDKGB2R2MOS36T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CBQTOIWVLCARXDKGB2R2MOS36T/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":"2026-05-20T19:00:16Z","links":{"resolver":"https://pith.science/pith/CBQTOIWVLCARXDKGB2R2MOS36T","bundle":"https://pith.science/pith/CBQTOIWVLCARXDKGB2R2MOS36T/bundle.json","state":"https://pith.science/pith/CBQTOIWVLCARXDKGB2R2MOS36T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CBQTOIWVLCARXDKGB2R2MOS36T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:CBQTOIWVLCARXDKGB2R2MOS36T","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":"0fe9aec9e37c484d6f6bd64545d2a730ad86694ecdff54ab9a70d52fa8e9b3a1","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-09-14T23:03:21Z","title_canon_sha256":"81b9545985f1a6389dbeb843005fbde4c3a3a53f04e477711b0ff5dbf6050ee7"},"schema_version":"1.0","source":{"id":"1109.3224","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.3224","created_at":"2026-05-18T03:38:05Z"},{"alias_kind":"arxiv_version","alias_value":"1109.3224v2","created_at":"2026-05-18T03:38:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.3224","created_at":"2026-05-18T03:38:05Z"},{"alias_kind":"pith_short_12","alias_value":"CBQTOIWVLCAR","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CBQTOIWVLCARXDKG","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CBQTOIWV","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:306ea8d76e1652f01201ceb19d3d7e3972927e3b23b9494980f09580b1914d36","target":"graph","created_at":"2026-05-18T03:38:05Z","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 study the realization of cosmic inflation in bigravity theories. By analyzing the evolution of scalar, vector, and tensor perturbations in de Sitter-like spacetimes, we find strong stability constraints on the class of viable vacua offered by these theories. More specifically, the only stable de Sitter vacua contain two nondecoupled gravitons (one of which is massive) with different maximal propagation speeds. We derive an effective theory for the massless graviton, which is found to propagate at an intermediate speed, limited by the two maximal values. For inflation, while the spectrum of ","authors_text":"Gonzalo A. Palma, Luis E. Campusano, Vicente Atal","cross_cats":["astro-ph.CO","gr-qc","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-09-14T23:03:21Z","title":"Bigravitational inflation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.3224","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":"sha256:86e563c72520dd565772dbe695baa2b5a8285259a5df1142550be2c1ceb9fdd0","target":"record","created_at":"2026-05-18T03:38:05Z","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":"0fe9aec9e37c484d6f6bd64545d2a730ad86694ecdff54ab9a70d52fa8e9b3a1","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2011-09-14T23:03:21Z","title_canon_sha256":"81b9545985f1a6389dbeb843005fbde4c3a3a53f04e477711b0ff5dbf6050ee7"},"schema_version":"1.0","source":{"id":"1109.3224","kind":"arxiv","version":2}},"canonical_sha256":"10613722d558811b8d460ea3a63a5bf4c235cbe8bc7a7f0ae2229c2ae9684efe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10613722d558811b8d460ea3a63a5bf4c235cbe8bc7a7f0ae2229c2ae9684efe","first_computed_at":"2026-05-18T03:38:05.140446Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:05.140446Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BWs2w2TqKaUr5MBNrHM9xvYaWsVGqt19fLjlvE/ruMj93MDGbgNau7Ps5qbcbsW45Tm41P7nhUKk4Kj56H3bAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:05.140826Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.3224","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:86e563c72520dd565772dbe695baa2b5a8285259a5df1142550be2c1ceb9fdd0","sha256:306ea8d76e1652f01201ceb19d3d7e3972927e3b23b9494980f09580b1914d36"],"state_sha256":"455b65422e1756126cf9df813e9d0e0763d6d4364788b45e5ab4ef74911a55b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8sFa0tq1Bz4GDvaamWk6IRyuMglQUpqtpjHX5St7e1jk6jxIdGio4KH6Bc5D+eWdAPRmL3uvc2u33Yvx+LCsAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T19:00:16.487236Z","bundle_sha256":"39ecc2e2daf7983359fb9fbeecead07cfc87277f028fbc77e0ebcff8eb59caac"}}