{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1995:CUBE2NWIPADM2MCKT4AEDZRGBW","short_pith_number":"pith:CUBE2NWI","canonical_record":{"source":{"id":"gr-qc/9503061","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1995-03-30T17:27:16Z","cross_cats_sorted":[],"title_canon_sha256":"7fe56e8f869b7bf140a3cfe69005ffba106196f71b68a830d50f1b26383c3222","abstract_canon_sha256":"381974f473b7bf0b27edddc266237d745518b8ac084784b78da0cc4dc9dbd59e"},"schema_version":"1.0"},"canonical_sha256":"15024d36c87806cd304a9f0041e6260da1e290c0c2665433aa21309ae9234843","source":{"kind":"arxiv","id":"gr-qc/9503061","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9503061","created_at":"2026-05-18T04:38:06Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9503061v1","created_at":"2026-05-18T04:38:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9503061","created_at":"2026-05-18T04:38:06Z"},{"alias_kind":"pith_short_12","alias_value":"CUBE2NWIPADM","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"CUBE2NWIPADM2MCK","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"CUBE2NWI","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1995:CUBE2NWIPADM2MCKT4AEDZRGBW","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/9503061","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1995-03-30T17:27:16Z","cross_cats_sorted":[],"title_canon_sha256":"7fe56e8f869b7bf140a3cfe69005ffba106196f71b68a830d50f1b26383c3222","abstract_canon_sha256":"381974f473b7bf0b27edddc266237d745518b8ac084784b78da0cc4dc9dbd59e"},"schema_version":"1.0"},"canonical_sha256":"15024d36c87806cd304a9f0041e6260da1e290c0c2665433aa21309ae9234843","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:38:06.919388Z","signature_b64":"gF0r5/TmmZoAWxHWD+dIj49YeclJqWrawDDex34HyBQ5AmNmMKOF6TPhl6tm/5ghibIfL11SmCX/YK+NAm0KDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"15024d36c87806cd304a9f0041e6260da1e290c0c2665433aa21309ae9234843","last_reissued_at":"2026-05-18T04:38:06.918925Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:38:06.918925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/9503061","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":"2026-05-18T04:38:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0OgKPPN5lZVC+HbIU3pyFtlz/lyHDN+HlTTiXOhBLmVOtjEZp1bR3yna+iHwuTBuc/gbznFTOj1WysDz+GhADA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:16:03.326377Z"},"content_sha256":"a478551b17ddb6e2eedb61bf6bb15d7e492a044b18a0cbc3d8ae85ca5b25bcb1","schema_version":"1.0","event_id":"sha256:a478551b17ddb6e2eedb61bf6bb15d7e492a044b18a0cbc3d8ae85ca5b25bcb1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1995:CUBE2NWIPADM2MCKT4AEDZRGBW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exact Hypersurface-Homogeneous Solutions in Cosmology and Astrophysics","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Claes Uggla, Kjell Rosquist, Robert T. Jantzen","submitted_at":"1995-03-30T17:27:16Z","abstract_excerpt":"A framework is introduced which explains the existence and similarities of most exact solutions of the Einstein equations with a wide range of sources for the class of hypersurface-homogeneous spacetimes which admit a Hamiltonian formulation. This class includes the spatially homogeneous cosmological models and the astrophysically interesting static spherically symmetric models as well as the stationary cylindrically symmetric models. The framework involves methods for finding and exploiting hidden symmetries and invariant submanifolds of the Hamiltonian formulation of the field equations. It "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9503061","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":"2026-05-18T04:38:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A6yow54wgHZoselaY6Ytri61M4ysfYkbeULEEJ5bjkZqxza6wWcvRBoqiqUiTdPUSmT3HqYdErw3M/a3VFkyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:16:03.326912Z"},"content_sha256":"1569b2a1b2b773157eb3aba4e7978bbd0888235ccd4e3add95e936e69f2499b5","schema_version":"1.0","event_id":"sha256:1569b2a1b2b773157eb3aba4e7978bbd0888235ccd4e3add95e936e69f2499b5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CUBE2NWIPADM2MCKT4AEDZRGBW/bundle.json","state_url":"https://pith.science/pith/CUBE2NWIPADM2MCKT4AEDZRGBW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CUBE2NWIPADM2MCKT4AEDZRGBW/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":"2026-05-25T21:16:03Z","links":{"resolver":"https://pith.science/pith/CUBE2NWIPADM2MCKT4AEDZRGBW","bundle":"https://pith.science/pith/CUBE2NWIPADM2MCKT4AEDZRGBW/bundle.json","state":"https://pith.science/pith/CUBE2NWIPADM2MCKT4AEDZRGBW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CUBE2NWIPADM2MCKT4AEDZRGBW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:CUBE2NWIPADM2MCKT4AEDZRGBW","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":"381974f473b7bf0b27edddc266237d745518b8ac084784b78da0cc4dc9dbd59e","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1995-03-30T17:27:16Z","title_canon_sha256":"7fe56e8f869b7bf140a3cfe69005ffba106196f71b68a830d50f1b26383c3222"},"schema_version":"1.0","source":{"id":"gr-qc/9503061","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9503061","created_at":"2026-05-18T04:38:06Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9503061v1","created_at":"2026-05-18T04:38:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9503061","created_at":"2026-05-18T04:38:06Z"},{"alias_kind":"pith_short_12","alias_value":"CUBE2NWIPADM","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"CUBE2NWIPADM2MCK","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"CUBE2NWI","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:1569b2a1b2b773157eb3aba4e7978bbd0888235ccd4e3add95e936e69f2499b5","target":"graph","created_at":"2026-05-18T04:38:06Z","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":"A framework is introduced which explains the existence and similarities of most exact solutions of the Einstein equations with a wide range of sources for the class of hypersurface-homogeneous spacetimes which admit a Hamiltonian formulation. This class includes the spatially homogeneous cosmological models and the astrophysically interesting static spherically symmetric models as well as the stationary cylindrically symmetric models. The framework involves methods for finding and exploiting hidden symmetries and invariant submanifolds of the Hamiltonian formulation of the field equations. It ","authors_text":"Claes Uggla, Kjell Rosquist, Robert T. Jantzen","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"1995-03-30T17:27:16Z","title":"Exact Hypersurface-Homogeneous Solutions in Cosmology and Astrophysics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9503061","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:a478551b17ddb6e2eedb61bf6bb15d7e492a044b18a0cbc3d8ae85ca5b25bcb1","target":"record","created_at":"2026-05-18T04:38:06Z","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":"381974f473b7bf0b27edddc266237d745518b8ac084784b78da0cc4dc9dbd59e","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1995-03-30T17:27:16Z","title_canon_sha256":"7fe56e8f869b7bf140a3cfe69005ffba106196f71b68a830d50f1b26383c3222"},"schema_version":"1.0","source":{"id":"gr-qc/9503061","kind":"arxiv","version":1}},"canonical_sha256":"15024d36c87806cd304a9f0041e6260da1e290c0c2665433aa21309ae9234843","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15024d36c87806cd304a9f0041e6260da1e290c0c2665433aa21309ae9234843","first_computed_at":"2026-05-18T04:38:06.918925Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:38:06.918925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gF0r5/TmmZoAWxHWD+dIj49YeclJqWrawDDex34HyBQ5AmNmMKOF6TPhl6tm/5ghibIfL11SmCX/YK+NAm0KDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:38:06.919388Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/9503061","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a478551b17ddb6e2eedb61bf6bb15d7e492a044b18a0cbc3d8ae85ca5b25bcb1","sha256:1569b2a1b2b773157eb3aba4e7978bbd0888235ccd4e3add95e936e69f2499b5"],"state_sha256":"6335f6d83868d280ba14e6fea499e762464ddccd0df27c4c5384338c01a989ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RynHyeOhLbapwESxOU5zNTu49Zm7+R5bEyiyekqFBmVp4z2CCCyHgBY+4Ac0aMN2SaNYG7K7t1STHFhEtmbEDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T21:16:03.330139Z","bundle_sha256":"fa8391011d8c60932fd2fbd5f986726d106b366fdf78077f8873f39401944db1"}}