{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:OVYXRAHPSM7BCKTQMPSLDVLRC3","short_pith_number":"pith:OVYXRAHP","canonical_record":{"source":{"id":"gr-qc/9905041","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1999-05-13T11:23:30Z","cross_cats_sorted":[],"title_canon_sha256":"6243c026fb73ce010e9c34e54f12a6e79a7b2fd171b30b1224d53b2c699ef2a3","abstract_canon_sha256":"4c2884cd0ffed04f5c00dfc32dfed68409d15cf7f47c0da1aea8ece75ef614de"},"schema_version":"1.0"},"canonical_sha256":"75717880ef933e112a7063e4b1d57116ccbea197a22a88d36b623602c544a9bc","source":{"kind":"arxiv","id":"gr-qc/9905041","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9905041","created_at":"2026-05-18T02:37:28Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9905041v1","created_at":"2026-05-18T02:37:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9905041","created_at":"2026-05-18T02:37:28Z"},{"alias_kind":"pith_short_12","alias_value":"OVYXRAHPSM7B","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"OVYXRAHPSM7BCKTQ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"OVYXRAHP","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:OVYXRAHPSM7BCKTQMPSLDVLRC3","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/9905041","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1999-05-13T11:23:30Z","cross_cats_sorted":[],"title_canon_sha256":"6243c026fb73ce010e9c34e54f12a6e79a7b2fd171b30b1224d53b2c699ef2a3","abstract_canon_sha256":"4c2884cd0ffed04f5c00dfc32dfed68409d15cf7f47c0da1aea8ece75ef614de"},"schema_version":"1.0"},"canonical_sha256":"75717880ef933e112a7063e4b1d57116ccbea197a22a88d36b623602c544a9bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:37:28.005825Z","signature_b64":"RoLZ5g9tvjhj9iAlVqBoC1FuFle7Tkf960pjRSSf5fwIWHWTnvob8Je9RKPb42V7ThvYoRJCVY1bFVlV7euGCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"75717880ef933e112a7063e4b1d57116ccbea197a22a88d36b623602c544a9bc","last_reissued_at":"2026-05-18T02:37:28.005324Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:37:28.005324Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/9905041","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":"2026-05-18T02:37:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y196IJ3sXqEA1OF31SPpPusEBJ+8RCRRBiqcnir3JEPl664NwAbzZ86Nwz8rxVw1Hu49LLwjZsbjvWryDanyBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:54:49.369389Z"},"content_sha256":"20e793b032d0d51c6d9f6ac80799d291ebbfa4afdfcbeb52e507c304ce672ff7","schema_version":"1.0","event_id":"sha256:20e793b032d0d51c6d9f6ac80799d291ebbfa4afdfcbeb52e507c304ce672ff7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:OVYXRAHPSM7BCKTQMPSLDVLRC3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Particle creation, renormalizability conditions and the mass-energy spectrum in gravity theories of quadratic Lagrangians","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"D. B. Papadopoulos, K. Kleidis","submitted_at":"1999-05-13T11:23:30Z","abstract_excerpt":"Massive scalar particle production, due to the anisotropic evolution of a five-dimensional spacetime, is considered in the context of a quadratic Lagrangian theory of gravity. Those particles, corresponding to field modes with non-vanishing momentum component along the fifth dimension, are created mostly in the neighbourhood of a singular epoch where only their high-frequency behaviour is of considerable importance. At the 1-loop approximation level, general renormalizability conditions on the physical quantities relevant to particle production are derived and discussed. Exact solutions of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9905041","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":"2026-05-18T02:37:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tvPIoaLoyk8wCBz/ZPLcnPL0muduI2XbHURY4+mNUQMhTR7YgzOCQWjA6ixTRbQFNm87zqGH7HK9cUwHAhhiBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:54:49.370055Z"},"content_sha256":"b8aa316a365afd2ce7adaa65b665a4c13ad940fa96627eb88c43035fb787ca14","schema_version":"1.0","event_id":"sha256:b8aa316a365afd2ce7adaa65b665a4c13ad940fa96627eb88c43035fb787ca14"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OVYXRAHPSM7BCKTQMPSLDVLRC3/bundle.json","state_url":"https://pith.science/pith/OVYXRAHPSM7BCKTQMPSLDVLRC3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OVYXRAHPSM7BCKTQMPSLDVLRC3/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":"2026-05-27T09:54:49Z","links":{"resolver":"https://pith.science/pith/OVYXRAHPSM7BCKTQMPSLDVLRC3","bundle":"https://pith.science/pith/OVYXRAHPSM7BCKTQMPSLDVLRC3/bundle.json","state":"https://pith.science/pith/OVYXRAHPSM7BCKTQMPSLDVLRC3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OVYXRAHPSM7BCKTQMPSLDVLRC3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:OVYXRAHPSM7BCKTQMPSLDVLRC3","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":"4c2884cd0ffed04f5c00dfc32dfed68409d15cf7f47c0da1aea8ece75ef614de","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1999-05-13T11:23:30Z","title_canon_sha256":"6243c026fb73ce010e9c34e54f12a6e79a7b2fd171b30b1224d53b2c699ef2a3"},"schema_version":"1.0","source":{"id":"gr-qc/9905041","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9905041","created_at":"2026-05-18T02:37:28Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9905041v1","created_at":"2026-05-18T02:37:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9905041","created_at":"2026-05-18T02:37:28Z"},{"alias_kind":"pith_short_12","alias_value":"OVYXRAHPSM7B","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"OVYXRAHPSM7BCKTQ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"OVYXRAHP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:b8aa316a365afd2ce7adaa65b665a4c13ad940fa96627eb88c43035fb787ca14","target":"graph","created_at":"2026-05-18T02:37:28Z","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":"Massive scalar particle production, due to the anisotropic evolution of a five-dimensional spacetime, is considered in the context of a quadratic Lagrangian theory of gravity. Those particles, corresponding to field modes with non-vanishing momentum component along the fifth dimension, are created mostly in the neighbourhood of a singular epoch where only their high-frequency behaviour is of considerable importance. At the 1-loop approximation level, general renormalizability conditions on the physical quantities relevant to particle production are derived and discussed. Exact solutions of the","authors_text":"D. B. Papadopoulos, K. Kleidis","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"1999-05-13T11:23:30Z","title":"Particle creation, renormalizability conditions and the mass-energy spectrum in gravity theories of quadratic Lagrangians"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9905041","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":"sha256:20e793b032d0d51c6d9f6ac80799d291ebbfa4afdfcbeb52e507c304ce672ff7","target":"record","created_at":"2026-05-18T02:37:28Z","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":"4c2884cd0ffed04f5c00dfc32dfed68409d15cf7f47c0da1aea8ece75ef614de","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1999-05-13T11:23:30Z","title_canon_sha256":"6243c026fb73ce010e9c34e54f12a6e79a7b2fd171b30b1224d53b2c699ef2a3"},"schema_version":"1.0","source":{"id":"gr-qc/9905041","kind":"arxiv","version":1}},"canonical_sha256":"75717880ef933e112a7063e4b1d57116ccbea197a22a88d36b623602c544a9bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75717880ef933e112a7063e4b1d57116ccbea197a22a88d36b623602c544a9bc","first_computed_at":"2026-05-18T02:37:28.005324Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:37:28.005324Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RoLZ5g9tvjhj9iAlVqBoC1FuFle7Tkf960pjRSSf5fwIWHWTnvob8Je9RKPb42V7ThvYoRJCVY1bFVlV7euGCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:37:28.005825Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/9905041","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:20e793b032d0d51c6d9f6ac80799d291ebbfa4afdfcbeb52e507c304ce672ff7","sha256:b8aa316a365afd2ce7adaa65b665a4c13ad940fa96627eb88c43035fb787ca14"],"state_sha256":"c2e43047a282d989738f3e56945335c2d3e59b76d40001cebe9f7d9346c1d6aa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M/0VJzzTZmkZxM4h6chTLewbXC1Bxr8wT2HN5ButFrBmbSZgGj6I1NnkwIb1TNayUx5pZKoExHvjJgWRkRNMCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T09:54:49.374046Z","bundle_sha256":"1067b77beca59ea54fb98592783f89e46ebe85713694a820bf71d33065cfb141"}}