{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:B6YQ5HXLE53DMIVMBNEZRNIZ2R","short_pith_number":"pith:B6YQ5HXL","canonical_record":{"source":{"id":"1709.01999","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2017-09-06T20:54:53Z","cross_cats_sorted":["astro-ph.CO","hep-ph"],"title_canon_sha256":"9a6006658589f3268f725b3a76fe4e3a7a300564910c69a08ce334e024b7dcce","abstract_canon_sha256":"9e62b2de324bd5db944d4782d5121b55a1024da98be1ba40f2a1cd2e399cf881"},"schema_version":"1.0"},"canonical_sha256":"0fb10e9eeb27763622ac0b4998b519d44ea8a8b0fcd078d8bfc80f813873d24f","source":{"kind":"arxiv","id":"1709.01999","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.01999","created_at":"2026-05-18T00:24:02Z"},{"alias_kind":"arxiv_version","alias_value":"1709.01999v2","created_at":"2026-05-18T00:24:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.01999","created_at":"2026-05-18T00:24:02Z"},{"alias_kind":"pith_short_12","alias_value":"B6YQ5HXLE53D","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"B6YQ5HXLE53DMIVM","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"B6YQ5HXL","created_at":"2026-05-18T12:31:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:B6YQ5HXLE53DMIVMBNEZRNIZ2R","target":"record","payload":{"canonical_record":{"source":{"id":"1709.01999","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2017-09-06T20:54:53Z","cross_cats_sorted":["astro-ph.CO","hep-ph"],"title_canon_sha256":"9a6006658589f3268f725b3a76fe4e3a7a300564910c69a08ce334e024b7dcce","abstract_canon_sha256":"9e62b2de324bd5db944d4782d5121b55a1024da98be1ba40f2a1cd2e399cf881"},"schema_version":"1.0"},"canonical_sha256":"0fb10e9eeb27763622ac0b4998b519d44ea8a8b0fcd078d8bfc80f813873d24f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:02.315348Z","signature_b64":"qVR/2UrtSmkh6bKlwgUqbpQUtaPmnzeGpuY9/WYYRMP89csfCf9SzwK0e4oyn8cSCfPR/UEjhP+wW+vEozwTDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0fb10e9eeb27763622ac0b4998b519d44ea8a8b0fcd078d8bfc80f813873d24f","last_reissued_at":"2026-05-18T00:24:02.314816Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:02.314816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.01999","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:24:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mjm+Rb+VvV8/RalRB8FS5ZJg2nYqKwL6+s0H45EejaSxrw5USODPgSph8tQsv1uTNmB93U3mDTiLvooQfa+rBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T12:48:07.621276Z"},"content_sha256":"d8e06243143d8491fe869345e36d49833407ad09c4a7abd77ca64d424318dade","schema_version":"1.0","event_id":"sha256:d8e06243143d8491fe869345e36d49833407ad09c4a7abd77ca64d424318dade"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:B6YQ5HXLE53DMIVMBNEZRNIZ2R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Born Again Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-ph"],"primary_cat":"hep-th","authors_text":"David E. Kaplan, Peter W. Graham, Surjeet Rajendran","submitted_at":"2017-09-06T20:54:53Z","abstract_excerpt":"We present a class of nonsingular, bouncing cosmologies that evade singularity theorems through the use of vorticity in compact extra dimensions. The vorticity combats the focusing of geodesics during the contracting phase. The construction requires fluids that violate the null energy condition (NEC) in the compact dimensions, where they can be provided by known stable NEC violating sources such as Casimir energy. The four dimensional effective theory contains an NEC violating fluid of Kaluza-Klein excitations of the higher dimensional metric. These spacetime metrics could potentially allow dy"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.01999","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:24:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tiqtPlZdOk4mSLGCRKNCkppYxA++69Dus47/EBhIqGas6Vfc8xmvgGjsjo1R7o82E5EtCgLRUpqOSacUh0OCCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T12:48:07.621858Z"},"content_sha256":"6241d1f61f25368b3271cee18450114021a9111ffd7635888103598322af0308","schema_version":"1.0","event_id":"sha256:6241d1f61f25368b3271cee18450114021a9111ffd7635888103598322af0308"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B6YQ5HXLE53DMIVMBNEZRNIZ2R/bundle.json","state_url":"https://pith.science/pith/B6YQ5HXLE53DMIVMBNEZRNIZ2R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B6YQ5HXLE53DMIVMBNEZRNIZ2R/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":"2026-05-21T12:48:07Z","links":{"resolver":"https://pith.science/pith/B6YQ5HXLE53DMIVMBNEZRNIZ2R","bundle":"https://pith.science/pith/B6YQ5HXLE53DMIVMBNEZRNIZ2R/bundle.json","state":"https://pith.science/pith/B6YQ5HXLE53DMIVMBNEZRNIZ2R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B6YQ5HXLE53DMIVMBNEZRNIZ2R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:B6YQ5HXLE53DMIVMBNEZRNIZ2R","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":"9e62b2de324bd5db944d4782d5121b55a1024da98be1ba40f2a1cd2e399cf881","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2017-09-06T20:54:53Z","title_canon_sha256":"9a6006658589f3268f725b3a76fe4e3a7a300564910c69a08ce334e024b7dcce"},"schema_version":"1.0","source":{"id":"1709.01999","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.01999","created_at":"2026-05-18T00:24:02Z"},{"alias_kind":"arxiv_version","alias_value":"1709.01999v2","created_at":"2026-05-18T00:24:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.01999","created_at":"2026-05-18T00:24:02Z"},{"alias_kind":"pith_short_12","alias_value":"B6YQ5HXLE53D","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"B6YQ5HXLE53DMIVM","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"B6YQ5HXL","created_at":"2026-05-18T12:31:08Z"}],"graph_snapshots":[{"event_id":"sha256:6241d1f61f25368b3271cee18450114021a9111ffd7635888103598322af0308","target":"graph","created_at":"2026-05-18T00:24:02Z","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 present a class of nonsingular, bouncing cosmologies that evade singularity theorems through the use of vorticity in compact extra dimensions. The vorticity combats the focusing of geodesics during the contracting phase. The construction requires fluids that violate the null energy condition (NEC) in the compact dimensions, where they can be provided by known stable NEC violating sources such as Casimir energy. The four dimensional effective theory contains an NEC violating fluid of Kaluza-Klein excitations of the higher dimensional metric. These spacetime metrics could potentially allow dy","authors_text":"David E. Kaplan, Peter W. Graham, Surjeet Rajendran","cross_cats":["astro-ph.CO","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2017-09-06T20:54:53Z","title":"Born Again Universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.01999","kind":"arxiv","version":2},"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:d8e06243143d8491fe869345e36d49833407ad09c4a7abd77ca64d424318dade","target":"record","created_at":"2026-05-18T00:24:02Z","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":"9e62b2de324bd5db944d4782d5121b55a1024da98be1ba40f2a1cd2e399cf881","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2017-09-06T20:54:53Z","title_canon_sha256":"9a6006658589f3268f725b3a76fe4e3a7a300564910c69a08ce334e024b7dcce"},"schema_version":"1.0","source":{"id":"1709.01999","kind":"arxiv","version":2}},"canonical_sha256":"0fb10e9eeb27763622ac0b4998b519d44ea8a8b0fcd078d8bfc80f813873d24f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0fb10e9eeb27763622ac0b4998b519d44ea8a8b0fcd078d8bfc80f813873d24f","first_computed_at":"2026-05-18T00:24:02.314816Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:02.314816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qVR/2UrtSmkh6bKlwgUqbpQUtaPmnzeGpuY9/WYYRMP89csfCf9SzwK0e4oyn8cSCfPR/UEjhP+wW+vEozwTDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:02.315348Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.01999","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8e06243143d8491fe869345e36d49833407ad09c4a7abd77ca64d424318dade","sha256:6241d1f61f25368b3271cee18450114021a9111ffd7635888103598322af0308"],"state_sha256":"597a391050381ade328757e1ed4abf5e007a20df3ecf81e0821722f3a9558f91"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XRCAHisw0dmO7/E19Rs5wHr7dC8Jm5hHrGFLY7vpfOQAwp565NX7AEoWFuyMjMCaoWhjHFuk1LYOqQDX4kI3Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T12:48:07.624998Z","bundle_sha256":"121b8daacce27d97f83011ca845b64c20705d5f537c2f6f99625424d55ec28d3"}}