{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:OTZ45KGTX7ZJ6WDBKDVKGMPAMR","short_pith_number":"pith:OTZ45KGT","canonical_record":{"source":{"id":"hep-th/9907067","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1999-07-09T18:30:51Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"56c73320aeea499b9e19fe4881600613c5bc8b0610c4ef6db70da70a73b04090","abstract_canon_sha256":"3e1e02b7836548b3c62c630f710e523221f66048f41f1ed4eb15bcc45c610ea8"},"schema_version":"1.0"},"canonical_sha256":"74f3cea8d3bff29f586150eaa331e0644aa69b1794e13981813b8876be8402bc","source":{"kind":"arxiv","id":"hep-th/9907067","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9907067","created_at":"2026-05-18T03:43:05Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9907067v1","created_at":"2026-05-18T03:43:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9907067","created_at":"2026-05-18T03:43:05Z"},{"alias_kind":"pith_short_12","alias_value":"OTZ45KGTX7ZJ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"OTZ45KGTX7ZJ6WDB","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"OTZ45KGT","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:OTZ45KGTX7ZJ6WDBKDVKGMPAMR","target":"record","payload":{"canonical_record":{"source":{"id":"hep-th/9907067","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1999-07-09T18:30:51Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"56c73320aeea499b9e19fe4881600613c5bc8b0610c4ef6db70da70a73b04090","abstract_canon_sha256":"3e1e02b7836548b3c62c630f710e523221f66048f41f1ed4eb15bcc45c610ea8"},"schema_version":"1.0"},"canonical_sha256":"74f3cea8d3bff29f586150eaa331e0644aa69b1794e13981813b8876be8402bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:43:05.623179Z","signature_b64":"Zf0bPkSLS/qOYCowo2JWkvjxKtDWmOCWjoNKjSMy4bRfNvv5s4bBUjKPg5kXubv6FvjmbnFMCgDR+Z7k51opBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74f3cea8d3bff29f586150eaa331e0644aa69b1794e13981813b8876be8402bc","last_reissued_at":"2026-05-18T03:43:05.622533Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:43:05.622533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-th/9907067","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":"2026-05-18T03:43:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jsnj51a+uURpxJNK/JESWC72gug2Pq5M0PVBK6PJHAIrIWbp2KM01vbMr8JBNm8ZZARSMDRvhP7PnaxyvZyBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T06:49:22.568218Z"},"content_sha256":"6290ea7bb0bba82477d48ff7b9e58ce0d8aa331af05a1be73dd56c2e71088b70","schema_version":"1.0","event_id":"sha256:6290ea7bb0bba82477d48ff7b9e58ce0d8aa331af05a1be73dd56c2e71088b70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:OTZ45KGTX7ZJ6WDBKDVKGMPAMR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Elementary introduction to pre-big bang cosmology and to the relic graviton background","license":"","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"M. Gasperini","submitted_at":"1999-07-09T18:30:51Z","abstract_excerpt":"This is a contracted version of a series of lectures for graduate and undergraduate students given at the {\\sl \"VI Seminario Nazionale di Fisica Teorica\"} (Parma, September 1997), at the Second Int. Conference {\\sl \"Around VIRGO\"} (Pisa, September 1998), and at the Second {\\sl SIGRAV} School on {\\sl \"Gravitational Waves in Astrophysics, Cosmology and String Theory\"} (Center \"A. Volta\", Como, April 1999). The aim is to provide an elementary, self-contained introduction to string cosmology and, in particular, to the background of relic cosmic gravitons predicted in the context of the so-called \""},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9907067","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":""},"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":"2026-05-18T03:43:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WTv7Tx4tRYUaNveYY0MRtEy0tpeNRv0q5BaA0QWwZKVDHAxGXoj3O3udc0NAnY4kc+nHim2TL2QMI5W/kdV2Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T06:49:22.568606Z"},"content_sha256":"ff7621571b2ef7492ddc0b8cab5b59b5e9fe2bb80bc56e0dc59ba6c87b9f88ec","schema_version":"1.0","event_id":"sha256:ff7621571b2ef7492ddc0b8cab5b59b5e9fe2bb80bc56e0dc59ba6c87b9f88ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OTZ45KGTX7ZJ6WDBKDVKGMPAMR/bundle.json","state_url":"https://pith.science/pith/OTZ45KGTX7ZJ6WDBKDVKGMPAMR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OTZ45KGTX7ZJ6WDBKDVKGMPAMR/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":"2026-06-01T06:49:22Z","links":{"resolver":"https://pith.science/pith/OTZ45KGTX7ZJ6WDBKDVKGMPAMR","bundle":"https://pith.science/pith/OTZ45KGTX7ZJ6WDBKDVKGMPAMR/bundle.json","state":"https://pith.science/pith/OTZ45KGTX7ZJ6WDBKDVKGMPAMR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OTZ45KGTX7ZJ6WDBKDVKGMPAMR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:OTZ45KGTX7ZJ6WDBKDVKGMPAMR","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":"3e1e02b7836548b3c62c630f710e523221f66048f41f1ed4eb15bcc45c610ea8","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1999-07-09T18:30:51Z","title_canon_sha256":"56c73320aeea499b9e19fe4881600613c5bc8b0610c4ef6db70da70a73b04090"},"schema_version":"1.0","source":{"id":"hep-th/9907067","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9907067","created_at":"2026-05-18T03:43:05Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9907067v1","created_at":"2026-05-18T03:43:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9907067","created_at":"2026-05-18T03:43:05Z"},{"alias_kind":"pith_short_12","alias_value":"OTZ45KGTX7ZJ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"OTZ45KGTX7ZJ6WDB","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"OTZ45KGT","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:ff7621571b2ef7492ddc0b8cab5b59b5e9fe2bb80bc56e0dc59ba6c87b9f88ec","target":"graph","created_at":"2026-05-18T03:43:05Z","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":"This is a contracted version of a series of lectures for graduate and undergraduate students given at the {\\sl \"VI Seminario Nazionale di Fisica Teorica\"} (Parma, September 1997), at the Second Int. Conference {\\sl \"Around VIRGO\"} (Pisa, September 1998), and at the Second {\\sl SIGRAV} School on {\\sl \"Gravitational Waves in Astrophysics, Cosmology and String Theory\"} (Center \"A. Volta\", Como, April 1999). The aim is to provide an elementary, self-contained introduction to string cosmology and, in particular, to the background of relic cosmic gravitons predicted in the context of the so-called \"","authors_text":"M. Gasperini","cross_cats":["gr-qc"],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1999-07-09T18:30:51Z","title":"Elementary introduction to pre-big bang cosmology and to the relic graviton background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9907067","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":"sha256:6290ea7bb0bba82477d48ff7b9e58ce0d8aa331af05a1be73dd56c2e71088b70","target":"record","created_at":"2026-05-18T03:43:05Z","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":"3e1e02b7836548b3c62c630f710e523221f66048f41f1ed4eb15bcc45c610ea8","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1999-07-09T18:30:51Z","title_canon_sha256":"56c73320aeea499b9e19fe4881600613c5bc8b0610c4ef6db70da70a73b04090"},"schema_version":"1.0","source":{"id":"hep-th/9907067","kind":"arxiv","version":1}},"canonical_sha256":"74f3cea8d3bff29f586150eaa331e0644aa69b1794e13981813b8876be8402bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74f3cea8d3bff29f586150eaa331e0644aa69b1794e13981813b8876be8402bc","first_computed_at":"2026-05-18T03:43:05.622533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:43:05.622533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Zf0bPkSLS/qOYCowo2JWkvjxKtDWmOCWjoNKjSMy4bRfNvv5s4bBUjKPg5kXubv6FvjmbnFMCgDR+Z7k51opBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:43:05.623179Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9907067","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6290ea7bb0bba82477d48ff7b9e58ce0d8aa331af05a1be73dd56c2e71088b70","sha256:ff7621571b2ef7492ddc0b8cab5b59b5e9fe2bb80bc56e0dc59ba6c87b9f88ec"],"state_sha256":"bd4ea5ff6c01e6910b4d80f73ce25c7ade6806a5708e525f1365f5f15ceaa109"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pvrRogrK42WEKLzlq3zc81iHaIRKdcX0BnWySjotjSLZUF/iSHQvBoUCcgiwwSVrHIGSlep0vBNaXiRF111eAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T06:49:22.570989Z","bundle_sha256":"94bb2040c3bfdb80439d4c1ab5baee3282e0a289a58a78d57bc389684e885931"}}