{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:ET4ZODV3SQJ44TB6GJTOIKUNOE","short_pith_number":"pith:ET4ZODV3","canonical_record":{"source":{"id":"hep-th/9905175","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1999-05-24T19:08:22Z","cross_cats_sorted":["astro-ph","gr-qc"],"title_canon_sha256":"ec92cf3f89421fad8fce19e4aa866c940c3520f287a9ea8550dcbec820c932e1","abstract_canon_sha256":"4ebc66b66c201b68f59b7ddfd3a7bec4b8a96c7100d539791b4a6070dd59bb04"},"schema_version":"1.0"},"canonical_sha256":"24f9970ebb9413ce4c3e3266e42a8d7139a6ad48b203e484e3ffb59df7b284a6","source":{"kind":"arxiv","id":"hep-th/9905175","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9905175","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9905175v3","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9905175","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"pith_short_12","alias_value":"ET4ZODV3SQJ4","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"pith_short_16","alias_value":"ET4ZODV3SQJ44TB6","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"pith_short_8","alias_value":"ET4ZODV3","created_at":"2026-07-04T16:14:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:ET4ZODV3SQJ44TB6GJTOIKUNOE","target":"record","payload":{"canonical_record":{"source":{"id":"hep-th/9905175","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1999-05-24T19:08:22Z","cross_cats_sorted":["astro-ph","gr-qc"],"title_canon_sha256":"ec92cf3f89421fad8fce19e4aa866c940c3520f287a9ea8550dcbec820c932e1","abstract_canon_sha256":"4ebc66b66c201b68f59b7ddfd3a7bec4b8a96c7100d539791b4a6070dd59bb04"},"schema_version":"1.0"},"canonical_sha256":"24f9970ebb9413ce4c3e3266e42a8d7139a6ad48b203e484e3ffb59df7b284a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:14:51.208213Z","signature_b64":"hpG+pC4aeovWBw+AQfg661wP4rB1spL7mZHdKkMXg/SYdvbfDvR5KpOwDocnu4gD/k6A+0VVAYtComMUqTGjDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24f9970ebb9413ce4c3e3266e42a8d7139a6ad48b203e484e3ffb59df7b284a6","last_reissued_at":"2026-07-04T16:14:51.207807Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:14:51.207807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-th/9905175","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":"2026-07-04T16:14:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rXSbAMJd+OWz9FiCb7u0BOoMJTdMATIjCyz9v6MyrZCozV4CAjX84uHaTSyxgj5VlxNr11L1pN3v4ZPCPkjSDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T12:45:38.977734Z"},"content_sha256":"f4c57fc0eed74ca4b82a8d7f414f4a3ec0bb14f770edffc3b39fdc9cae9edf83","schema_version":"1.0","event_id":"sha256:f4c57fc0eed74ca4b82a8d7f414f4a3ec0bb14f770edffc3b39fdc9cae9edf83"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:ET4ZODV3SQJ44TB6GJTOIKUNOE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonsingular Dilaton Cosmology in the String Frame","license":"","headline":"","cross_cats":["astro-ph","gr-qc"],"primary_cat":"hep-th","authors_text":"Damien A. Easson, Robert H. Brandenberger","submitted_at":"1999-05-24T19:08:22Z","abstract_excerpt":"We consider the theory obtained by adding to the usual string frame dilaton gravity action specially constructed higher derivative terms motivated by the limited curvature construction of [MukhanovET1992a] and determine the spatially homogeneous and isotropic solutions to the resulting equations of motion. All solutions of the resulting theory of gravity with these symmetries are nonsingular and all curvature invariants are bounded. For initial conditions inspired by the pre-big-bang scenario solutions exist which correspond to a spatially flat Universe starting in a dilaton-dominated superinf"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9905175","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-th/9905175/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":"2026-07-04T16:14:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ekP/dGR1bK4LW+QHtnxhLhg4XSIKE+6TknZTyF1jO736yN0e1OfZr2OIAQoW4eQZ0wxmuHYcJGiiYhZTJcGAAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T12:45:38.978576Z"},"content_sha256":"369d1f1d5b95ff28756f2d59f5e766db28eab82e6a06a713a7f2361a0acbf93b","schema_version":"1.0","event_id":"sha256:369d1f1d5b95ff28756f2d59f5e766db28eab82e6a06a713a7f2361a0acbf93b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ET4ZODV3SQJ44TB6GJTOIKUNOE/bundle.json","state_url":"https://pith.science/pith/ET4ZODV3SQJ44TB6GJTOIKUNOE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ET4ZODV3SQJ44TB6GJTOIKUNOE/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":"2026-08-11T12:45:38Z","links":{"resolver":"https://pith.science/pith/ET4ZODV3SQJ44TB6GJTOIKUNOE","bundle":"https://pith.science/pith/ET4ZODV3SQJ44TB6GJTOIKUNOE/bundle.json","state":"https://pith.science/pith/ET4ZODV3SQJ44TB6GJTOIKUNOE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ET4ZODV3SQJ44TB6GJTOIKUNOE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:ET4ZODV3SQJ44TB6GJTOIKUNOE","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":"4ebc66b66c201b68f59b7ddfd3a7bec4b8a96c7100d539791b4a6070dd59bb04","cross_cats_sorted":["astro-ph","gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1999-05-24T19:08:22Z","title_canon_sha256":"ec92cf3f89421fad8fce19e4aa866c940c3520f287a9ea8550dcbec820c932e1"},"schema_version":"1.0","source":{"id":"hep-th/9905175","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9905175","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9905175v3","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9905175","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"pith_short_12","alias_value":"ET4ZODV3SQJ4","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"pith_short_16","alias_value":"ET4ZODV3SQJ44TB6","created_at":"2026-07-04T16:14:51Z"},{"alias_kind":"pith_short_8","alias_value":"ET4ZODV3","created_at":"2026-07-04T16:14:51Z"}],"graph_snapshots":[{"event_id":"sha256:369d1f1d5b95ff28756f2d59f5e766db28eab82e6a06a713a7f2361a0acbf93b","target":"graph","created_at":"2026-07-04T16:14:51Z","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/hep-th/9905175/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We consider the theory obtained by adding to the usual string frame dilaton gravity action specially constructed higher derivative terms motivated by the limited curvature construction of [MukhanovET1992a] and determine the spatially homogeneous and isotropic solutions to the resulting equations of motion. All solutions of the resulting theory of gravity with these symmetries are nonsingular and all curvature invariants are bounded. For initial conditions inspired by the pre-big-bang scenario solutions exist which correspond to a spatially flat Universe starting in a dilaton-dominated superinf","authors_text":"Damien A. Easson, Robert H. Brandenberger","cross_cats":["astro-ph","gr-qc"],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1999-05-24T19:08:22Z","title":"Nonsingular Dilaton Cosmology in the String Frame"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9905175","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:f4c57fc0eed74ca4b82a8d7f414f4a3ec0bb14f770edffc3b39fdc9cae9edf83","target":"record","created_at":"2026-07-04T16:14:51Z","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":"4ebc66b66c201b68f59b7ddfd3a7bec4b8a96c7100d539791b4a6070dd59bb04","cross_cats_sorted":["astro-ph","gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1999-05-24T19:08:22Z","title_canon_sha256":"ec92cf3f89421fad8fce19e4aa866c940c3520f287a9ea8550dcbec820c932e1"},"schema_version":"1.0","source":{"id":"hep-th/9905175","kind":"arxiv","version":3}},"canonical_sha256":"24f9970ebb9413ce4c3e3266e42a8d7139a6ad48b203e484e3ffb59df7b284a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24f9970ebb9413ce4c3e3266e42a8d7139a6ad48b203e484e3ffb59df7b284a6","first_computed_at":"2026-07-04T16:14:51.207807Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:14:51.207807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hpG+pC4aeovWBw+AQfg661wP4rB1spL7mZHdKkMXg/SYdvbfDvR5KpOwDocnu4gD/k6A+0VVAYtComMUqTGjDg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:14:51.208213Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9905175","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f4c57fc0eed74ca4b82a8d7f414f4a3ec0bb14f770edffc3b39fdc9cae9edf83","sha256:369d1f1d5b95ff28756f2d59f5e766db28eab82e6a06a713a7f2361a0acbf93b"],"state_sha256":"876253eaf552dce3e338497424a82874b89e7299e8b30bc7d4ab4731ae00b0b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MzLnG6r7xdrRSVOBTLaF42FsWOEwXKRzKjfdts3pGVoxB0FI7VgP9+MCVOs6tkk9QKo69q4jQnsfO6vp5wehAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T12:45:38.985480Z","bundle_sha256":"ebd979d7bd36f1483351d2a69f02155ece273f6f4c118d321310f177e8bbfaed"}}