{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:DUY2HFBQRHRBYOD5XHFX6ASFQR","short_pith_number":"pith:DUY2HFBQ","canonical_record":{"source":{"id":"1406.0729","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-06-03T14:47:43Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"48ae9ca6c3319b101d781493144225698937ff1b6f315a4be6c133fc07ce45de","abstract_canon_sha256":"01e4fbbc84b2020eea33a45c0ead163c2a9fb2f1714695418e05ac8eb40f4ac2"},"schema_version":"1.0"},"canonical_sha256":"1d31a3943089e21c387db9cb7f024584518fd210d71af6a3f0cf2d1c1ac94472","source":{"kind":"arxiv","id":"1406.0729","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.0729","created_at":"2026-05-17T23:52:09Z"},{"alias_kind":"arxiv_version","alias_value":"1406.0729v2","created_at":"2026-05-17T23:52:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.0729","created_at":"2026-05-17T23:52:09Z"},{"alias_kind":"pith_short_12","alias_value":"DUY2HFBQRHRB","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DUY2HFBQRHRBYOD5","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DUY2HFBQ","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:DUY2HFBQRHRBYOD5XHFX6ASFQR","target":"record","payload":{"canonical_record":{"source":{"id":"1406.0729","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-06-03T14:47:43Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"48ae9ca6c3319b101d781493144225698937ff1b6f315a4be6c133fc07ce45de","abstract_canon_sha256":"01e4fbbc84b2020eea33a45c0ead163c2a9fb2f1714695418e05ac8eb40f4ac2"},"schema_version":"1.0"},"canonical_sha256":"1d31a3943089e21c387db9cb7f024584518fd210d71af6a3f0cf2d1c1ac94472","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:09.576571Z","signature_b64":"Nz+Mk6G5SsJSOVUWtL5KrOpjmLyZdXJPWjNIHE1rzTaYurX9ZNXmDuC3CWASXLpweocv3JwSoPOF0UUIlxg6Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1d31a3943089e21c387db9cb7f024584518fd210d71af6a3f0cf2d1c1ac94472","last_reissued_at":"2026-05-17T23:52:09.576202Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:09.576202Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.0729","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":"2026-05-17T23:52:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G379rXZlEJgq4UK6v0F/hxHkZhyMsxOc8U7lmrAAWwnStbMLygMlWXt8aDd9PiziFIaYJZwt6tFW4TCLwwqXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:38:08.323497Z"},"content_sha256":"714af0fafa37b2f568141ea33d19a6f14589bf9fb57f9a96c73cb28f64494cfd","schema_version":"1.0","event_id":"sha256:714af0fafa37b2f568141ea33d19a6f14589bf9fb57f9a96c73cb28f64494cfd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:DUY2HFBQRHRBYOD5XHFX6ASFQR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Absence of gyratons in the Robinson-Trautman class","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Jiri Podolsky, Robert Svarc","submitted_at":"2014-06-03T14:47:43Z","abstract_excerpt":"We present the Riemann and Ricci tensors for a fully general non-twisting and shear-free geometry in arbitrary dimension D. This includes both the non-expanding Kundt and expanding Robinson-Trautman family of spacetimes. As an interesting application of these explicit expressions we then integrate the Einstein equations and prove a surprising fact that in any D the Robinson-Trautman class does not admit solutions representing gyratonic sources, i.e., matter field in the form of a null fluid (or particles propagating with the speed of light) with an additional internal spin. Contrary to the clo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.0729","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":"2026-05-17T23:52:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zukJ/LrqTC9OzZFZcQV4eJG27RJdz6fV9F8zoycYx1iLdKtd3ySNlRhEyovXVkNVn4VK+2quR79SriUI4V6yAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:38:08.323950Z"},"content_sha256":"b96bc4d960828c32adb2482d9f8f64830fafa82b36b37eee10b7a67f4c4f8613","schema_version":"1.0","event_id":"sha256:b96bc4d960828c32adb2482d9f8f64830fafa82b36b37eee10b7a67f4c4f8613"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DUY2HFBQRHRBYOD5XHFX6ASFQR/bundle.json","state_url":"https://pith.science/pith/DUY2HFBQRHRBYOD5XHFX6ASFQR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DUY2HFBQRHRBYOD5XHFX6ASFQR/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":"2026-05-28T04:38:08Z","links":{"resolver":"https://pith.science/pith/DUY2HFBQRHRBYOD5XHFX6ASFQR","bundle":"https://pith.science/pith/DUY2HFBQRHRBYOD5XHFX6ASFQR/bundle.json","state":"https://pith.science/pith/DUY2HFBQRHRBYOD5XHFX6ASFQR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DUY2HFBQRHRBYOD5XHFX6ASFQR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:DUY2HFBQRHRBYOD5XHFX6ASFQR","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":"01e4fbbc84b2020eea33a45c0ead163c2a9fb2f1714695418e05ac8eb40f4ac2","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-06-03T14:47:43Z","title_canon_sha256":"48ae9ca6c3319b101d781493144225698937ff1b6f315a4be6c133fc07ce45de"},"schema_version":"1.0","source":{"id":"1406.0729","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.0729","created_at":"2026-05-17T23:52:09Z"},{"alias_kind":"arxiv_version","alias_value":"1406.0729v2","created_at":"2026-05-17T23:52:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.0729","created_at":"2026-05-17T23:52:09Z"},{"alias_kind":"pith_short_12","alias_value":"DUY2HFBQRHRB","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DUY2HFBQRHRBYOD5","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DUY2HFBQ","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:b96bc4d960828c32adb2482d9f8f64830fafa82b36b37eee10b7a67f4c4f8613","target":"graph","created_at":"2026-05-17T23:52:09Z","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 the Riemann and Ricci tensors for a fully general non-twisting and shear-free geometry in arbitrary dimension D. This includes both the non-expanding Kundt and expanding Robinson-Trautman family of spacetimes. As an interesting application of these explicit expressions we then integrate the Einstein equations and prove a surprising fact that in any D the Robinson-Trautman class does not admit solutions representing gyratonic sources, i.e., matter field in the form of a null fluid (or particles propagating with the speed of light) with an additional internal spin. Contrary to the clo","authors_text":"Jiri Podolsky, Robert Svarc","cross_cats":["hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-06-03T14:47:43Z","title":"Absence of gyratons in the Robinson-Trautman class"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.0729","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":"sha256:714af0fafa37b2f568141ea33d19a6f14589bf9fb57f9a96c73cb28f64494cfd","target":"record","created_at":"2026-05-17T23:52:09Z","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":"01e4fbbc84b2020eea33a45c0ead163c2a9fb2f1714695418e05ac8eb40f4ac2","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-06-03T14:47:43Z","title_canon_sha256":"48ae9ca6c3319b101d781493144225698937ff1b6f315a4be6c133fc07ce45de"},"schema_version":"1.0","source":{"id":"1406.0729","kind":"arxiv","version":2}},"canonical_sha256":"1d31a3943089e21c387db9cb7f024584518fd210d71af6a3f0cf2d1c1ac94472","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1d31a3943089e21c387db9cb7f024584518fd210d71af6a3f0cf2d1c1ac94472","first_computed_at":"2026-05-17T23:52:09.576202Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:09.576202Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nz+Mk6G5SsJSOVUWtL5KrOpjmLyZdXJPWjNIHE1rzTaYurX9ZNXmDuC3CWASXLpweocv3JwSoPOF0UUIlxg6Cg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:09.576571Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.0729","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:714af0fafa37b2f568141ea33d19a6f14589bf9fb57f9a96c73cb28f64494cfd","sha256:b96bc4d960828c32adb2482d9f8f64830fafa82b36b37eee10b7a67f4c4f8613"],"state_sha256":"f6dcd463a10c75f0f9109fcdeb1fd54d5c4b7c16ac72ac0ff9d87f38308f8e9e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aZAQGvkv41qw51WJkEOcGbYQfuDRuAGZJEiwpdh1gzciGtYDdspCVS+kJ9BQunwrMgf6KGu9fIwhcl46b7WOCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:38:08.326412Z","bundle_sha256":"3d0f8f43fe7ea1822cc15c7887e146d1d751330756adcf117531d7dc48ea38fe"}}