{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:KR4AM6EZX46S2GYQEDORUWB4D3","short_pith_number":"pith:KR4AM6EZ","canonical_record":{"source":{"id":"1110.6223","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-10-28T00:15:09Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"5bde7316ddb8f73bbd9174dc262c7f63657365cec9c5d288ba560387f5596a9c","abstract_canon_sha256":"06f28320dba79cd425fd5dc7dd2f94f851bdcf7d27349f975ee918558ba8da26"},"schema_version":"1.0"},"canonical_sha256":"5478067899bf3d2d1b1020dd1a583c1ef4fc665427262a9a003878b323e847e3","source":{"kind":"arxiv","id":"1110.6223","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.6223","created_at":"2026-05-18T01:59:50Z"},{"alias_kind":"arxiv_version","alias_value":"1110.6223v1","created_at":"2026-05-18T01:59:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.6223","created_at":"2026-05-18T01:59:50Z"},{"alias_kind":"pith_short_12","alias_value":"KR4AM6EZX46S","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"KR4AM6EZX46S2GYQ","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"KR4AM6EZ","created_at":"2026-05-18T12:26:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:KR4AM6EZX46S2GYQEDORUWB4D3","target":"record","payload":{"canonical_record":{"source":{"id":"1110.6223","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-10-28T00:15:09Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"5bde7316ddb8f73bbd9174dc262c7f63657365cec9c5d288ba560387f5596a9c","abstract_canon_sha256":"06f28320dba79cd425fd5dc7dd2f94f851bdcf7d27349f975ee918558ba8da26"},"schema_version":"1.0"},"canonical_sha256":"5478067899bf3d2d1b1020dd1a583c1ef4fc665427262a9a003878b323e847e3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:50.809253Z","signature_b64":"89Uc9PKbhNpo/gRblgil5UWP36opm4WqCiqm4wqPTTWhkmN3swunUI+3mk6wwEe7Mwpatr37fHMtIEpVtUQxDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5478067899bf3d2d1b1020dd1a583c1ef4fc665427262a9a003878b323e847e3","last_reissued_at":"2026-05-18T01:59:50.808786Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:50.808786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.6223","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":"2026-05-18T01:59:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CLvFWpYwZLpYdH7OVByWubOpzvwzmqyLSJg4MOKe1Dn9l7WqLVkGiRsbtQj5BOV7lCqJ5FeZOEpATPGMrTJvBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:43:20.232786Z"},"content_sha256":"9e6d1e81bbfcc9acb27491aa81d15074083c4e997db22c2aec088759ceff940f","schema_version":"1.0","event_id":"sha256:9e6d1e81bbfcc9acb27491aa81d15074083c4e997db22c2aec088759ceff940f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:KR4AM6EZX46S2GYQEDORUWB4D3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Closed String Tachyon: Inflation and Cosmological Collapse","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Celia Escamilla-Rivera, Gerardo Garcia-Jimenez, Octavio Obregon, Oscar Loaiza-Brito","submitted_at":"2011-10-28T00:15:09Z","abstract_excerpt":"By compactifying a critical bosonic string theory on an internal non-flat space with a constant volume, we study the role played by the closed string tachyon in the cosmology of the effective four-dimensional space-time. The effective tachyon potential consists on a negative constant related to the internal curvature space and a polynomial with only quadratic and quartic terms of the tachyon field. Based on it, we present a solution for the tachyon field and the scale factor, which describes an accelerated universe which expands to a maximum value before collapsing. At early times, the closed "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.6223","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":"2026-05-18T01:59:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I9vS4eKFzet33CjQ+voSOaCX4ypQv2p3hsl2UEc4YEdx0cPl+MqiDOsCV48fVMZXwp7nipiz8DZUKQKB97imCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:43:20.233479Z"},"content_sha256":"201a4de01c3c2cb5d321dc2270853ce5e80e2cd4d6e0283f7861a875e2789787","schema_version":"1.0","event_id":"sha256:201a4de01c3c2cb5d321dc2270853ce5e80e2cd4d6e0283f7861a875e2789787"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KR4AM6EZX46S2GYQEDORUWB4D3/bundle.json","state_url":"https://pith.science/pith/KR4AM6EZX46S2GYQEDORUWB4D3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KR4AM6EZX46S2GYQEDORUWB4D3/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":"2026-05-25T12:43:20Z","links":{"resolver":"https://pith.science/pith/KR4AM6EZX46S2GYQEDORUWB4D3","bundle":"https://pith.science/pith/KR4AM6EZX46S2GYQEDORUWB4D3/bundle.json","state":"https://pith.science/pith/KR4AM6EZX46S2GYQEDORUWB4D3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KR4AM6EZX46S2GYQEDORUWB4D3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:KR4AM6EZX46S2GYQEDORUWB4D3","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":"06f28320dba79cd425fd5dc7dd2f94f851bdcf7d27349f975ee918558ba8da26","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-10-28T00:15:09Z","title_canon_sha256":"5bde7316ddb8f73bbd9174dc262c7f63657365cec9c5d288ba560387f5596a9c"},"schema_version":"1.0","source":{"id":"1110.6223","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.6223","created_at":"2026-05-18T01:59:50Z"},{"alias_kind":"arxiv_version","alias_value":"1110.6223v1","created_at":"2026-05-18T01:59:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.6223","created_at":"2026-05-18T01:59:50Z"},{"alias_kind":"pith_short_12","alias_value":"KR4AM6EZX46S","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"KR4AM6EZX46S2GYQ","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"KR4AM6EZ","created_at":"2026-05-18T12:26:34Z"}],"graph_snapshots":[{"event_id":"sha256:201a4de01c3c2cb5d321dc2270853ce5e80e2cd4d6e0283f7861a875e2789787","target":"graph","created_at":"2026-05-18T01:59:50Z","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":"By compactifying a critical bosonic string theory on an internal non-flat space with a constant volume, we study the role played by the closed string tachyon in the cosmology of the effective four-dimensional space-time. The effective tachyon potential consists on a negative constant related to the internal curvature space and a polynomial with only quadratic and quartic terms of the tachyon field. Based on it, we present a solution for the tachyon field and the scale factor, which describes an accelerated universe which expands to a maximum value before collapsing. At early times, the closed ","authors_text":"Celia Escamilla-Rivera, Gerardo Garcia-Jimenez, Octavio Obregon, Oscar Loaiza-Brito","cross_cats":["hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-10-28T00:15:09Z","title":"Closed String Tachyon: Inflation and Cosmological Collapse"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.6223","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":"sha256:9e6d1e81bbfcc9acb27491aa81d15074083c4e997db22c2aec088759ceff940f","target":"record","created_at":"2026-05-18T01:59:50Z","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":"06f28320dba79cd425fd5dc7dd2f94f851bdcf7d27349f975ee918558ba8da26","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-10-28T00:15:09Z","title_canon_sha256":"5bde7316ddb8f73bbd9174dc262c7f63657365cec9c5d288ba560387f5596a9c"},"schema_version":"1.0","source":{"id":"1110.6223","kind":"arxiv","version":1}},"canonical_sha256":"5478067899bf3d2d1b1020dd1a583c1ef4fc665427262a9a003878b323e847e3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5478067899bf3d2d1b1020dd1a583c1ef4fc665427262a9a003878b323e847e3","first_computed_at":"2026-05-18T01:59:50.808786Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:50.808786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"89Uc9PKbhNpo/gRblgil5UWP36opm4WqCiqm4wqPTTWhkmN3swunUI+3mk6wwEe7Mwpatr37fHMtIEpVtUQxDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:50.809253Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.6223","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e6d1e81bbfcc9acb27491aa81d15074083c4e997db22c2aec088759ceff940f","sha256:201a4de01c3c2cb5d321dc2270853ce5e80e2cd4d6e0283f7861a875e2789787"],"state_sha256":"3d664077e248e988aef01071f878e1454be25fab9719eeae5433c6fa593752da"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KL6SULYjlF4IrwXWGkYuLNgazfSUlCDgYx83ga+ahG1VJhOL8sabhTUpw7QI/bZBLLeM8CNAVYtw+JPDfOb7BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T12:43:20.240744Z","bundle_sha256":"287155e9aabd2fa0c07d79ce6f16b347ac30bb57a92e0231a12fe0def0d8c9dd"}}