{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:IWWGELRUVMSHSRBQZR3N7RPFCP","short_pith_number":"pith:IWWGELRU","canonical_record":{"source":{"id":"0811.4644","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2008-11-28T04:15:28Z","cross_cats_sorted":[],"title_canon_sha256":"6a6bbfbb8a8e1b1913a1c918700b764d09119c710be065179bdab2e4dae3ac54","abstract_canon_sha256":"65927ff23764e09825d55990d7883ff11c27802b83123796ce4893d9839797bc"},"schema_version":"1.0"},"canonical_sha256":"45ac622e34ab24794430cc76dfc5e513fc1116dd5d95c31fdbe234ff147b865a","source":{"kind":"arxiv","id":"0811.4644","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.4644","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"arxiv_version","alias_value":"0811.4644v1","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.4644","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"pith_short_12","alias_value":"IWWGELRUVMSH","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"IWWGELRUVMSHSRBQ","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"IWWGELRU","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:IWWGELRUVMSHSRBQZR3N7RPFCP","target":"record","payload":{"canonical_record":{"source":{"id":"0811.4644","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2008-11-28T04:15:28Z","cross_cats_sorted":[],"title_canon_sha256":"6a6bbfbb8a8e1b1913a1c918700b764d09119c710be065179bdab2e4dae3ac54","abstract_canon_sha256":"65927ff23764e09825d55990d7883ff11c27802b83123796ce4893d9839797bc"},"schema_version":"1.0"},"canonical_sha256":"45ac622e34ab24794430cc76dfc5e513fc1116dd5d95c31fdbe234ff147b865a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:20:23.559078Z","signature_b64":"NLBSZud68vTQCAz3Y8OhqThX5rpHHFL8BOuyEON8W9PZ+12PQg9qm4ebEXvmhvtgy3ZE9QFbp0K/CrZmu2dwAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"45ac622e34ab24794430cc76dfc5e513fc1116dd5d95c31fdbe234ff147b865a","last_reissued_at":"2026-05-18T04:20:23.558531Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:20:23.558531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0811.4644","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":"2026-05-18T04:20:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zdX9xJFrcnfiSYSEKi4H8ko5n3SrduHk5luPjxPDjCWylWJpiJMieOColh6y3HaVVJPDZVofLqwCwTlDS2zPBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:47:47.188000Z"},"content_sha256":"4ba388686bfe7b2b87019cdf2e9b99511fcfc2f50babda3e54e9298847c41d5e","schema_version":"1.0","event_id":"sha256:4ba388686bfe7b2b87019cdf2e9b99511fcfc2f50babda3e54e9298847c41d5e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:IWWGELRUVMSHSRBQZR3N7RPFCP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Behavior of tachyon in string cosmology based on gauged WZW model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Soonkeon Nam, Sunggeun Lee","submitted_at":"2008-11-28T04:15:28Z","abstract_excerpt":"We investigate a string theoretic cosmological model in the context of the gauged Wess-Zumino-Witten model. Our model is based on a product of non-compact coset space and a spectator flat space; $[SL(2,R)/U(1)]_k \\times {\\bf R}^2$. We extend the formerly studied semiclassical consideration with infinite Kac-Moody level $k$ to a finite one. In this case, the tachyon field appears in the effective action, and we solve the Einstein equation to determine the behavior of tachyon as a function of time. We find that tachyon field dominates over dilaton field in early times. In particular, we consider"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.4644","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":"2026-05-18T04:20:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k6khEjv0/WjI8q+MOQBchL9XfScziAPShO697gLBnqsRASqXIm9EXU99kK5t/yUQY9pPpIrvRk8by1b69KoUBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:47:47.188347Z"},"content_sha256":"d8f796591cd6c84d691f466c222d02ab4c5e0f000a2d1887775c7e854fe8b57b","schema_version":"1.0","event_id":"sha256:d8f796591cd6c84d691f466c222d02ab4c5e0f000a2d1887775c7e854fe8b57b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IWWGELRUVMSHSRBQZR3N7RPFCP/bundle.json","state_url":"https://pith.science/pith/IWWGELRUVMSHSRBQZR3N7RPFCP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IWWGELRUVMSHSRBQZR3N7RPFCP/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":"2026-07-04T23:47:47Z","links":{"resolver":"https://pith.science/pith/IWWGELRUVMSHSRBQZR3N7RPFCP","bundle":"https://pith.science/pith/IWWGELRUVMSHSRBQZR3N7RPFCP/bundle.json","state":"https://pith.science/pith/IWWGELRUVMSHSRBQZR3N7RPFCP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IWWGELRUVMSHSRBQZR3N7RPFCP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:IWWGELRUVMSHSRBQZR3N7RPFCP","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":"65927ff23764e09825d55990d7883ff11c27802b83123796ce4893d9839797bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2008-11-28T04:15:28Z","title_canon_sha256":"6a6bbfbb8a8e1b1913a1c918700b764d09119c710be065179bdab2e4dae3ac54"},"schema_version":"1.0","source":{"id":"0811.4644","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.4644","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"arxiv_version","alias_value":"0811.4644v1","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.4644","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"pith_short_12","alias_value":"IWWGELRUVMSH","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"IWWGELRUVMSHSRBQ","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"IWWGELRU","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:d8f796591cd6c84d691f466c222d02ab4c5e0f000a2d1887775c7e854fe8b57b","target":"graph","created_at":"2026-05-18T04:20:23Z","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":"We investigate a string theoretic cosmological model in the context of the gauged Wess-Zumino-Witten model. Our model is based on a product of non-compact coset space and a spectator flat space; $[SL(2,R)/U(1)]_k \\times {\\bf R}^2$. We extend the formerly studied semiclassical consideration with infinite Kac-Moody level $k$ to a finite one. In this case, the tachyon field appears in the effective action, and we solve the Einstein equation to determine the behavior of tachyon as a function of time. We find that tachyon field dominates over dilaton field in early times. In particular, we consider","authors_text":"Soonkeon Nam, Sunggeun Lee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2008-11-28T04:15:28Z","title":"Behavior of tachyon in string cosmology based on gauged WZW model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.4644","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":"sha256:4ba388686bfe7b2b87019cdf2e9b99511fcfc2f50babda3e54e9298847c41d5e","target":"record","created_at":"2026-05-18T04:20:23Z","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":"65927ff23764e09825d55990d7883ff11c27802b83123796ce4893d9839797bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2008-11-28T04:15:28Z","title_canon_sha256":"6a6bbfbb8a8e1b1913a1c918700b764d09119c710be065179bdab2e4dae3ac54"},"schema_version":"1.0","source":{"id":"0811.4644","kind":"arxiv","version":1}},"canonical_sha256":"45ac622e34ab24794430cc76dfc5e513fc1116dd5d95c31fdbe234ff147b865a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45ac622e34ab24794430cc76dfc5e513fc1116dd5d95c31fdbe234ff147b865a","first_computed_at":"2026-05-18T04:20:23.558531Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:20:23.558531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NLBSZud68vTQCAz3Y8OhqThX5rpHHFL8BOuyEON8W9PZ+12PQg9qm4ebEXvmhvtgy3ZE9QFbp0K/CrZmu2dwAw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:20:23.559078Z","signed_message":"canonical_sha256_bytes"},"source_id":"0811.4644","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ba388686bfe7b2b87019cdf2e9b99511fcfc2f50babda3e54e9298847c41d5e","sha256:d8f796591cd6c84d691f466c222d02ab4c5e0f000a2d1887775c7e854fe8b57b"],"state_sha256":"2c70e0598c4f753cb86b84ba9a19d681fbc4bc6b61abcd1327298ac9e4dc6ec0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pzyHKXIap4i82IoZOOkRCuWkyPYVGjniiI1r2YJLjWpXqLD9uBZ8mPfeZxMdvgfkNTqUWWT52UJ85u6Dx2wpCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T23:47:47.190079Z","bundle_sha256":"66584135e740af360183c13fb7edf1f5d8c8db262f7f05845e3505bffb3b9c37"}}