{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:LELF4TVRDPB26KDYUQO2LCAWW2","short_pith_number":"pith:LELF4TVR","canonical_record":{"source":{"id":"1708.06371","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-08-21T18:08:49Z","cross_cats_sorted":[],"title_canon_sha256":"6eac8fddf0cbe1bbcb401c6f9e3818d28fd12bd4af183a66ec0ca1336bb30918","abstract_canon_sha256":"f61cc6cba5d0c9fc50c6d6e596252870c040c57133f24b5433134a7004e2b02e"},"schema_version":"1.0"},"canonical_sha256":"59165e4eb11bc3af2878a41da58816b6a634f9bebe8b5820c9530b48a10f47fe","source":{"kind":"arxiv","id":"1708.06371","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.06371","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"arxiv_version","alias_value":"1708.06371v3","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.06371","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"pith_short_12","alias_value":"LELF4TVRDPB2","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LELF4TVRDPB26KDY","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LELF4TVR","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:LELF4TVRDPB26KDYUQO2LCAWW2","target":"record","payload":{"canonical_record":{"source":{"id":"1708.06371","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-08-21T18:08:49Z","cross_cats_sorted":[],"title_canon_sha256":"6eac8fddf0cbe1bbcb401c6f9e3818d28fd12bd4af183a66ec0ca1336bb30918","abstract_canon_sha256":"f61cc6cba5d0c9fc50c6d6e596252870c040c57133f24b5433134a7004e2b02e"},"schema_version":"1.0"},"canonical_sha256":"59165e4eb11bc3af2878a41da58816b6a634f9bebe8b5820c9530b48a10f47fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:13.098670Z","signature_b64":"ZMON4/ImI3bHDvcsVaway+Pdq2RmC4BtiFC2MkJpROyt00cZTXurC6Ot6HusXkV04VcO9xjPHJFi0wsYEn+YCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"59165e4eb11bc3af2878a41da58816b6a634f9bebe8b5820c9530b48a10f47fe","last_reissued_at":"2026-05-18T00:27:13.098115Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:13.098115Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.06371","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:27:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q6LgmGkTw2f3npCW6C3uW0s7Z+zYAcen22ZCFEFkZ7ZXMdA9fPe75Jf20cf+0D3j5mXmKjz5QBp44zKBreKxDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:51:11.755912Z"},"content_sha256":"428ede614a738d1ac49c9b319777dcd7b3ba882a8e6f23cff0ddf7f063ebfc78","schema_version":"1.0","event_id":"sha256:428ede614a738d1ac49c9b319777dcd7b3ba882a8e6f23cff0ddf7f063ebfc78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:LELF4TVRDPB26KDYUQO2LCAWW2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On Bouncing and Nonsingular Solutions in Einstein-scalar-Gauss-Bonnet Cosmology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Laura Sberna, Paolo Pani","submitted_at":"2017-08-21T18:08:49Z","abstract_excerpt":"It is generically believed that higher-order curvature corrections to the Einstein-Hilbert action might cure the curvature singularities that plague general relativity. Here we consider Einstein-scalar-Gauss-Bonnet gravity, the only four-dimensional, ghost-free theory with quadratic curvature terms. For any choice of the coupling function and of the scalar potential, we show that the theory does not allow for bouncing solutions in the flat and open Friedmann universe. For the case of a closed universe, using a reverse-engineering method, we explicitly provide a bouncing solution which is never"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.06371","kind":"arxiv","version":3},"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":"2026-05-18T00:27:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OmeHFOlKXcvtkO6Q8a0fQm3DlJLq/AvBrrKe+RjTSgxuhZdzenzO8M9N+MshmvvKyH8IL7/eAcrCuks9o/w0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:51:11.756254Z"},"content_sha256":"3344e85ea9f42d3ea95379c7135f22e0f820cdff7f8fb3b9ff8dd5eff044a74d","schema_version":"1.0","event_id":"sha256:3344e85ea9f42d3ea95379c7135f22e0f820cdff7f8fb3b9ff8dd5eff044a74d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LELF4TVRDPB26KDYUQO2LCAWW2/bundle.json","state_url":"https://pith.science/pith/LELF4TVRDPB26KDYUQO2LCAWW2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LELF4TVRDPB26KDYUQO2LCAWW2/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":"2026-06-04T19:51:11Z","links":{"resolver":"https://pith.science/pith/LELF4TVRDPB26KDYUQO2LCAWW2","bundle":"https://pith.science/pith/LELF4TVRDPB26KDYUQO2LCAWW2/bundle.json","state":"https://pith.science/pith/LELF4TVRDPB26KDYUQO2LCAWW2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LELF4TVRDPB26KDYUQO2LCAWW2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:LELF4TVRDPB26KDYUQO2LCAWW2","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":"f61cc6cba5d0c9fc50c6d6e596252870c040c57133f24b5433134a7004e2b02e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-08-21T18:08:49Z","title_canon_sha256":"6eac8fddf0cbe1bbcb401c6f9e3818d28fd12bd4af183a66ec0ca1336bb30918"},"schema_version":"1.0","source":{"id":"1708.06371","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.06371","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"arxiv_version","alias_value":"1708.06371v3","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.06371","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"pith_short_12","alias_value":"LELF4TVRDPB2","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LELF4TVRDPB26KDY","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LELF4TVR","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:3344e85ea9f42d3ea95379c7135f22e0f820cdff7f8fb3b9ff8dd5eff044a74d","target":"graph","created_at":"2026-05-18T00:27:13Z","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":"It is generically believed that higher-order curvature corrections to the Einstein-Hilbert action might cure the curvature singularities that plague general relativity. Here we consider Einstein-scalar-Gauss-Bonnet gravity, the only four-dimensional, ghost-free theory with quadratic curvature terms. For any choice of the coupling function and of the scalar potential, we show that the theory does not allow for bouncing solutions in the flat and open Friedmann universe. For the case of a closed universe, using a reverse-engineering method, we explicitly provide a bouncing solution which is never","authors_text":"Laura Sberna, Paolo Pani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-08-21T18:08:49Z","title":"On Bouncing and Nonsingular Solutions in Einstein-scalar-Gauss-Bonnet Cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.06371","kind":"arxiv","version":3},"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":"sha256:428ede614a738d1ac49c9b319777dcd7b3ba882a8e6f23cff0ddf7f063ebfc78","target":"record","created_at":"2026-05-18T00:27:13Z","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":"f61cc6cba5d0c9fc50c6d6e596252870c040c57133f24b5433134a7004e2b02e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-08-21T18:08:49Z","title_canon_sha256":"6eac8fddf0cbe1bbcb401c6f9e3818d28fd12bd4af183a66ec0ca1336bb30918"},"schema_version":"1.0","source":{"id":"1708.06371","kind":"arxiv","version":3}},"canonical_sha256":"59165e4eb11bc3af2878a41da58816b6a634f9bebe8b5820c9530b48a10f47fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"59165e4eb11bc3af2878a41da58816b6a634f9bebe8b5820c9530b48a10f47fe","first_computed_at":"2026-05-18T00:27:13.098115Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:13.098115Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZMON4/ImI3bHDvcsVaway+Pdq2RmC4BtiFC2MkJpROyt00cZTXurC6Ot6HusXkV04VcO9xjPHJFi0wsYEn+YCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:13.098670Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.06371","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:428ede614a738d1ac49c9b319777dcd7b3ba882a8e6f23cff0ddf7f063ebfc78","sha256:3344e85ea9f42d3ea95379c7135f22e0f820cdff7f8fb3b9ff8dd5eff044a74d"],"state_sha256":"9e231f1be30c1240b6bb33f5f60e2b55e3c0a11cec742a305a9a50fbe287c4e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"45kveCSIABImg0HY1Yi0Qfs+6gb4obegI9LP3/Y27DYAyqyWTMOvM5Ajvzfj6Iq8xkn9bOc+jBzmKQLeVS2HDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T19:51:11.758152Z","bundle_sha256":"ad7cc58ce5ffbe94987d84c3bfca4426ecc15ce021c09f018c949aa8c5907df6"}}