{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:NT7UXWSGNG2R5J4YRI5GVDXCN4","short_pith_number":"pith:NT7UXWSG","canonical_record":{"source":{"id":"2308.11770","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-08-18T14:43:32Z","cross_cats_sorted":[],"title_canon_sha256":"4945798222054a48bd804d897d9d816414047b7e6752410f432397c9ccf8b8d1","abstract_canon_sha256":"4157930aca5781fd28fbd3c87097a81977e28c34f07cae25ce7cde0e571dd028"},"schema_version":"1.0"},"canonical_sha256":"6cff4bda4669b51ea7988a3a6a8ee26f3390c03da31a9291a3c9bf59b973021c","source":{"kind":"arxiv","id":"2308.11770","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.11770","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"arxiv_version","alias_value":"2308.11770v1","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.11770","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"pith_short_12","alias_value":"NT7UXWSGNG2R","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"pith_short_16","alias_value":"NT7UXWSGNG2R5J4Y","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"pith_short_8","alias_value":"NT7UXWSG","created_at":"2026-07-05T06:43:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:NT7UXWSGNG2R5J4YRI5GVDXCN4","target":"record","payload":{"canonical_record":{"source":{"id":"2308.11770","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-08-18T14:43:32Z","cross_cats_sorted":[],"title_canon_sha256":"4945798222054a48bd804d897d9d816414047b7e6752410f432397c9ccf8b8d1","abstract_canon_sha256":"4157930aca5781fd28fbd3c87097a81977e28c34f07cae25ce7cde0e571dd028"},"schema_version":"1.0"},"canonical_sha256":"6cff4bda4669b51ea7988a3a6a8ee26f3390c03da31a9291a3c9bf59b973021c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:43:54.703120Z","signature_b64":"STFttdN7eD5kzE6xJ5dEtZ+i5U5CPNI5oWMMOfGteqwcVlHAbO/J7SY0/7L5KE2+UXnkCCNV1E9fyyxWRljlCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cff4bda4669b51ea7988a3a6a8ee26f3390c03da31a9291a3c9bf59b973021c","last_reissued_at":"2026-07-05T06:43:54.702630Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:43:54.702630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2308.11770","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":"2026-07-05T06:43:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/P4qgq4p2o9i0zyIJ5F/SWrUVTTyyuPdXidosA2F5MpyblRFtzm7xyCODVbPso8Q/ZhjcwEM+6OZYI/uihKsDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T02:20:59.586108Z"},"content_sha256":"44855e5d924963519d7b18e14ac8d84a771a2e459fb8430fb31d63ca08ddd756","schema_version":"1.0","event_id":"sha256:44855e5d924963519d7b18e14ac8d84a771a2e459fb8430fb31d63ca08ddd756"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:NT7UXWSGNG2R5J4YRI5GVDXCN4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Inflation and cosmological evolution with $F(R,G)$ gravity theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Abhik Kumar Sanyal, Dalia Saha, Jyoti Prasad Saha","submitted_at":"2023-08-18T14:43:32Z","abstract_excerpt":"In the last decade Planck PR4 data together with ground-based experimental data such as, BK18, BAO and CMB lensing, tightened constraint of the tensor to scalar ratio, starting form $r < 0.14$ to $r < 0.032$, while the spectral index lies within the range $0.9631 < n_s < 0.9705$. Viability of modified gravity theories, proposed as alternatives to the dark-energy issue, should therefore be tested in the light of such new result. Here, we explore $F(R,G)$ gravity theory in regard of the early universe and have shown that, it is not compatible with newly released constraints on $r$ and $n_s$ simu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.11770","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2308.11770/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":"2026-07-05T06:43:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ISWHgq9U3UwRU6TshlD4sdw1RYU2y2GEEveieCfd2zWKJotXD0Q7e6ylJOf2LK6MQCD/UHKPzCQlvH/+SLx2Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T02:20:59.586610Z"},"content_sha256":"018f3566af77ca791d1da2ecb5ce61da11c2acde2c715336a25dc36bbf74cc77","schema_version":"1.0","event_id":"sha256:018f3566af77ca791d1da2ecb5ce61da11c2acde2c715336a25dc36bbf74cc77"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NT7UXWSGNG2R5J4YRI5GVDXCN4/bundle.json","state_url":"https://pith.science/pith/NT7UXWSGNG2R5J4YRI5GVDXCN4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NT7UXWSGNG2R5J4YRI5GVDXCN4/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":"2026-08-04T02:20:59Z","links":{"resolver":"https://pith.science/pith/NT7UXWSGNG2R5J4YRI5GVDXCN4","bundle":"https://pith.science/pith/NT7UXWSGNG2R5J4YRI5GVDXCN4/bundle.json","state":"https://pith.science/pith/NT7UXWSGNG2R5J4YRI5GVDXCN4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NT7UXWSGNG2R5J4YRI5GVDXCN4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:NT7UXWSGNG2R5J4YRI5GVDXCN4","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":"4157930aca5781fd28fbd3c87097a81977e28c34f07cae25ce7cde0e571dd028","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-08-18T14:43:32Z","title_canon_sha256":"4945798222054a48bd804d897d9d816414047b7e6752410f432397c9ccf8b8d1"},"schema_version":"1.0","source":{"id":"2308.11770","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.11770","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"arxiv_version","alias_value":"2308.11770v1","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.11770","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"pith_short_12","alias_value":"NT7UXWSGNG2R","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"pith_short_16","alias_value":"NT7UXWSGNG2R5J4Y","created_at":"2026-07-05T06:43:54Z"},{"alias_kind":"pith_short_8","alias_value":"NT7UXWSG","created_at":"2026-07-05T06:43:54Z"}],"graph_snapshots":[{"event_id":"sha256:018f3566af77ca791d1da2ecb5ce61da11c2acde2c715336a25dc36bbf74cc77","target":"graph","created_at":"2026-07-05T06:43:54Z","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/2308.11770/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In the last decade Planck PR4 data together with ground-based experimental data such as, BK18, BAO and CMB lensing, tightened constraint of the tensor to scalar ratio, starting form $r < 0.14$ to $r < 0.032$, while the spectral index lies within the range $0.9631 < n_s < 0.9705$. Viability of modified gravity theories, proposed as alternatives to the dark-energy issue, should therefore be tested in the light of such new result. Here, we explore $F(R,G)$ gravity theory in regard of the early universe and have shown that, it is not compatible with newly released constraints on $r$ and $n_s$ simu","authors_text":"Abhik Kumar Sanyal, Dalia Saha, Jyoti Prasad Saha","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-08-18T14:43:32Z","title":"Inflation and cosmological evolution with $F(R,G)$ gravity theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.11770","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":"sha256:44855e5d924963519d7b18e14ac8d84a771a2e459fb8430fb31d63ca08ddd756","target":"record","created_at":"2026-07-05T06:43:54Z","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":"4157930aca5781fd28fbd3c87097a81977e28c34f07cae25ce7cde0e571dd028","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-08-18T14:43:32Z","title_canon_sha256":"4945798222054a48bd804d897d9d816414047b7e6752410f432397c9ccf8b8d1"},"schema_version":"1.0","source":{"id":"2308.11770","kind":"arxiv","version":1}},"canonical_sha256":"6cff4bda4669b51ea7988a3a6a8ee26f3390c03da31a9291a3c9bf59b973021c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6cff4bda4669b51ea7988a3a6a8ee26f3390c03da31a9291a3c9bf59b973021c","first_computed_at":"2026-07-05T06:43:54.702630Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:43:54.702630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"STFttdN7eD5kzE6xJ5dEtZ+i5U5CPNI5oWMMOfGteqwcVlHAbO/J7SY0/7L5KE2+UXnkCCNV1E9fyyxWRljlCg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:43:54.703120Z","signed_message":"canonical_sha256_bytes"},"source_id":"2308.11770","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:44855e5d924963519d7b18e14ac8d84a771a2e459fb8430fb31d63ca08ddd756","sha256:018f3566af77ca791d1da2ecb5ce61da11c2acde2c715336a25dc36bbf74cc77"],"state_sha256":"df0ba9d5464e4955b76c28447330c3465a39f2eb53cc57ff7fd650c02a47ea5f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Buu0qOqJ+wAPMIpqGVxZ1LJWj7OHF7NNBOIQI8hMZ5oW5Z4ULPjGxLP3gTDdgsD7xwANi97l78E7kzK0tPqnCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T02:20:59.590061Z","bundle_sha256":"7b9412e6fcd3c5133462222c8f762a80fc1f520fa6e683fc9e0e355ef6ee8190"}}