{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:3ZA4CDZWLIHGQPSKRNN23BKIUZ","short_pith_number":"pith:3ZA4CDZW","canonical_record":{"source":{"id":"0810.2262","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-10-13T16:28:20Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"19f826bf8a90ef9f2b7ccebebc1a34534d87aa26b2b2b87804ad73927b5bee1f","abstract_canon_sha256":"34103271610915d1926c74f76b1d0222d6b7acb23caca0eb933a8f6635568f4c"},"schema_version":"1.0"},"canonical_sha256":"de41c10f365a0e683e4a8b5bad8548a667aab92a958c314e200aaaa40d814a1b","source":{"kind":"arxiv","id":"0810.2262","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.2262","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"arxiv_version","alias_value":"0810.2262v2","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.2262","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"pith_short_12","alias_value":"3ZA4CDZWLIHG","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"pith_short_16","alias_value":"3ZA4CDZWLIHGQPSK","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"pith_short_8","alias_value":"3ZA4CDZW","created_at":"2026-07-04T15:47:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:3ZA4CDZWLIHGQPSKRNN23BKIUZ","target":"record","payload":{"canonical_record":{"source":{"id":"0810.2262","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-10-13T16:28:20Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"19f826bf8a90ef9f2b7ccebebc1a34534d87aa26b2b2b87804ad73927b5bee1f","abstract_canon_sha256":"34103271610915d1926c74f76b1d0222d6b7acb23caca0eb933a8f6635568f4c"},"schema_version":"1.0"},"canonical_sha256":"de41c10f365a0e683e4a8b5bad8548a667aab92a958c314e200aaaa40d814a1b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:47:21.671812Z","signature_b64":"u5FcpjkboqoJKcqkB+wwKiWr3WN+utxrnlxMmlCfV1fwZOzW2F7oqn4tLLdx26tbIaZ24r3lpc/vkrYDpvMyCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"de41c10f365a0e683e4a8b5bad8548a667aab92a958c314e200aaaa40d814a1b","last_reissued_at":"2026-07-04T15:47:21.671458Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:47:21.671458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.2262","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":"2026-07-04T15:47:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Lg1oX+DAN58aD+13NKhsJRJutuWjYwThVlBMzJu/7Bm0XN/cikedbWPyPYOIY6nBkWahzbg5Zq12ZXYqnmSwCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:55:03.143756Z"},"content_sha256":"1745b8f451c4c3112d52128b8699943ce2189babb28bed920b007d432e0d4d52","schema_version":"1.0","event_id":"sha256:1745b8f451c4c3112d52128b8699943ce2189babb28bed920b007d432e0d4d52"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:3ZA4CDZWLIHGQPSKRNN23BKIUZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On freeze-out problem in relativistic hydrodynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"nucl-th","authors_text":"V.N. Russkikh, Yu.B. Ivanov","submitted_at":"2008-10-13T16:28:20Z","abstract_excerpt":"A finite unbound system which is equilibrium in one reference frame is in general nonequilibrium in another frame. This is a consequence of the relative character of the time synchronization in the relativistic physics. This puzzle was a prime motivation of the Cooper--Frye approach to the freeze-out in relativistic hydrodynamics. Solution of the puzzle reveals that the Cooper--Frye recipe is far not a unique phenomenological method that meets requirements of energy-momentum conservation. Alternative freeze-out recipes are considered and discussed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.2262","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0810.2262/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:47:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NPZ14grKbahXayQdvBYdT/qvmCga4L7gbrXrST1tqDbdskj1k8w9HMddlqgSoeb0wFOsHlaa0x8wdJVz2cjxBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:55:03.144294Z"},"content_sha256":"c155941dceabe9fbd187a28cb5e7fe8895d3d45178b8efcd1b0b4150e4d1014e","schema_version":"1.0","event_id":"sha256:c155941dceabe9fbd187a28cb5e7fe8895d3d45178b8efcd1b0b4150e4d1014e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3ZA4CDZWLIHGQPSKRNN23BKIUZ/bundle.json","state_url":"https://pith.science/pith/3ZA4CDZWLIHGQPSKRNN23BKIUZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3ZA4CDZWLIHGQPSKRNN23BKIUZ/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":"2026-08-04T17:55:03Z","links":{"resolver":"https://pith.science/pith/3ZA4CDZWLIHGQPSKRNN23BKIUZ","bundle":"https://pith.science/pith/3ZA4CDZWLIHGQPSKRNN23BKIUZ/bundle.json","state":"https://pith.science/pith/3ZA4CDZWLIHGQPSKRNN23BKIUZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3ZA4CDZWLIHGQPSKRNN23BKIUZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:3ZA4CDZWLIHGQPSKRNN23BKIUZ","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":"34103271610915d1926c74f76b1d0222d6b7acb23caca0eb933a8f6635568f4c","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-10-13T16:28:20Z","title_canon_sha256":"19f826bf8a90ef9f2b7ccebebc1a34534d87aa26b2b2b87804ad73927b5bee1f"},"schema_version":"1.0","source":{"id":"0810.2262","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.2262","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"arxiv_version","alias_value":"0810.2262v2","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.2262","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"pith_short_12","alias_value":"3ZA4CDZWLIHG","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"pith_short_16","alias_value":"3ZA4CDZWLIHGQPSK","created_at":"2026-07-04T15:47:21Z"},{"alias_kind":"pith_short_8","alias_value":"3ZA4CDZW","created_at":"2026-07-04T15:47:21Z"}],"graph_snapshots":[{"event_id":"sha256:c155941dceabe9fbd187a28cb5e7fe8895d3d45178b8efcd1b0b4150e4d1014e","target":"graph","created_at":"2026-07-04T15:47:21Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0810.2262/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A finite unbound system which is equilibrium in one reference frame is in general nonequilibrium in another frame. This is a consequence of the relative character of the time synchronization in the relativistic physics. This puzzle was a prime motivation of the Cooper--Frye approach to the freeze-out in relativistic hydrodynamics. Solution of the puzzle reveals that the Cooper--Frye recipe is far not a unique phenomenological method that meets requirements of energy-momentum conservation. Alternative freeze-out recipes are considered and discussed.","authors_text":"V.N. Russkikh, Yu.B. Ivanov","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-10-13T16:28:20Z","title":"On freeze-out problem in relativistic hydrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.2262","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":"sha256:1745b8f451c4c3112d52128b8699943ce2189babb28bed920b007d432e0d4d52","target":"record","created_at":"2026-07-04T15:47:21Z","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":"34103271610915d1926c74f76b1d0222d6b7acb23caca0eb933a8f6635568f4c","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2008-10-13T16:28:20Z","title_canon_sha256":"19f826bf8a90ef9f2b7ccebebc1a34534d87aa26b2b2b87804ad73927b5bee1f"},"schema_version":"1.0","source":{"id":"0810.2262","kind":"arxiv","version":2}},"canonical_sha256":"de41c10f365a0e683e4a8b5bad8548a667aab92a958c314e200aaaa40d814a1b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de41c10f365a0e683e4a8b5bad8548a667aab92a958c314e200aaaa40d814a1b","first_computed_at":"2026-07-04T15:47:21.671458Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:47:21.671458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u5FcpjkboqoJKcqkB+wwKiWr3WN+utxrnlxMmlCfV1fwZOzW2F7oqn4tLLdx26tbIaZ24r3lpc/vkrYDpvMyCA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:47:21.671812Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.2262","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1745b8f451c4c3112d52128b8699943ce2189babb28bed920b007d432e0d4d52","sha256:c155941dceabe9fbd187a28cb5e7fe8895d3d45178b8efcd1b0b4150e4d1014e"],"state_sha256":"85c531a98edd0426e62bc0403db7e7bafb8a78919155247680bef0adfefdfc95"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mBxWywQ1jh5Yi/71bcBKm2qyaIHrSOWxboiSPVNErq1LYIs/gDyNDUW5qjkMaCvxt4aXEoBW7UQV2/+gXxEyCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T17:55:03.150174Z","bundle_sha256":"43c0b888edc94b05a75dadf4397fcdf3d72f08dbffd5dfa73c7aeb39f8cc0136"}}