{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:DYAW45RJNNOPPVUW665OEVUHZK","short_pith_number":"pith:DYAW45RJ","schema_version":"1.0","canonical_sha256":"1e016e76296b5cf7d696f7bae25687ca8e4e99f3b066a8f685496e968c870955","source":{"kind":"arxiv","id":"1610.04207","version":2},"attestation_state":"computed","paper":{"title":"Stability of Geodesically Complete Cosmologies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"hep-th","authors_text":"David Pirtskhalava, Enrico Trincherini, Luca Santoni, Paolo Creminelli","submitted_at":"2016-10-13T19:28:11Z","abstract_excerpt":"We study the stability of spatially flat FRW solutions which are geodesically complete, i.e. for which one can follow null (graviton) geodesics both in the past and in the future without ever encountering singularities. This is the case of NEC-violating cosmologies such as smooth bounces or solutions which approach Minkowski in the past. We study the EFT of linear perturbations around a solution of this kind, including the possibility of multiple fields and fluids. One generally faces a gradient instability which can be avoided only if the operator $~^{(3)}{R} \\delta N~$ is present and its coe"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1610.04207","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-10-13T19:28:11Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"855f97b32e698a9c3c61efab94485d728fecef7f46960f0db531ab97b0a6279a","abstract_canon_sha256":"319ac2f63e193ac0f813da4c928f1bdb9e8cf97076073a26b5ede6ecb5b3adee"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:40.741125Z","signature_b64":"INFQuRnao7xXKErLxjr1+p1C7RCCKh8epqo4HCg6hVQNpk3YDj6vo17T45vbRb+Nb2MN+3Ct7GN1p9WpjZeIDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1e016e76296b5cf7d696f7bae25687ca8e4e99f3b066a8f685496e968c870955","last_reissued_at":"2026-05-18T00:55:40.740591Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:40.740591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Stability of Geodesically Complete Cosmologies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"hep-th","authors_text":"David Pirtskhalava, Enrico Trincherini, Luca Santoni, Paolo Creminelli","submitted_at":"2016-10-13T19:28:11Z","abstract_excerpt":"We study the stability of spatially flat FRW solutions which are geodesically complete, i.e. for which one can follow null (graviton) geodesics both in the past and in the future without ever encountering singularities. This is the case of NEC-violating cosmologies such as smooth bounces or solutions which approach Minkowski in the past. We study the EFT of linear perturbations around a solution of this kind, including the possibility of multiple fields and fluids. One generally faces a gradient instability which can be avoided only if the operator $~^{(3)}{R} \\delta N~$ is present and its coe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.04207","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1610.04207","created_at":"2026-05-18T00:55:40.740679+00:00"},{"alias_kind":"arxiv_version","alias_value":"1610.04207v2","created_at":"2026-05-18T00:55:40.740679+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.04207","created_at":"2026-05-18T00:55:40.740679+00:00"},{"alias_kind":"pith_short_12","alias_value":"DYAW45RJNNOP","created_at":"2026-05-18T12:30:12.583610+00:00"},{"alias_kind":"pith_short_16","alias_value":"DYAW45RJNNOPPVUW","created_at":"2026-05-18T12:30:12.583610+00:00"},{"alias_kind":"pith_short_8","alias_value":"DYAW45RJ","created_at":"2026-05-18T12:30:12.583610+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2602.21642","citing_title":"Geodesic completion of big bangs from emergent geometry","ref_index":14,"is_internal_anchor":true},{"citing_arxiv_id":"2604.27103","citing_title":"Geodesically Complete Curvature-Bounce Inflation","ref_index":22,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK","json":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK.json","graph_json":"https://pith.science/api/pith-number/DYAW45RJNNOPPVUW665OEVUHZK/graph.json","events_json":"https://pith.science/api/pith-number/DYAW45RJNNOPPVUW665OEVUHZK/events.json","paper":"https://pith.science/paper/DYAW45RJ"},"agent_actions":{"view_html":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK","download_json":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK.json","view_paper":"https://pith.science/paper/DYAW45RJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1610.04207&json=true","fetch_graph":"https://pith.science/api/pith-number/DYAW45RJNNOPPVUW665OEVUHZK/graph.json","fetch_events":"https://pith.science/api/pith-number/DYAW45RJNNOPPVUW665OEVUHZK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK/action/storage_attestation","attest_author":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK/action/author_attestation","sign_citation":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK/action/citation_signature","submit_replication":"https://pith.science/pith/DYAW45RJNNOPPVUW665OEVUHZK/action/replication_record"}},"created_at":"2026-05-18T00:55:40.740679+00:00","updated_at":"2026-05-18T00:55:40.740679+00:00"}