{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:BB4244RJDQ34ZWPCZG4HWMUXKB","short_pith_number":"pith:BB4244RJ","canonical_record":{"source":{"id":"1903.04044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-10T19:08:57Z","cross_cats_sorted":[],"title_canon_sha256":"9c097f049c6d2494f90c86e2c0119968f371ac719339773a7c11ec8100c3d4df","abstract_canon_sha256":"b48286e427fbed985c285259c63581a2a1fe9e688a04b33d3f73ae6886eaaccd"},"schema_version":"1.0"},"canonical_sha256":"0879ae72291c37ccd9e2c9b87b3297504dbe1ff70dabab00c3239f6d99614ea6","source":{"kind":"arxiv","id":"1903.04044","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.04044","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"arxiv_version","alias_value":"1903.04044v1","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.04044","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"pith_short_12","alias_value":"BB4244RJDQ34","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BB4244RJDQ34ZWPC","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BB4244RJ","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:BB4244RJDQ34ZWPCZG4HWMUXKB","target":"record","payload":{"canonical_record":{"source":{"id":"1903.04044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-10T19:08:57Z","cross_cats_sorted":[],"title_canon_sha256":"9c097f049c6d2494f90c86e2c0119968f371ac719339773a7c11ec8100c3d4df","abstract_canon_sha256":"b48286e427fbed985c285259c63581a2a1fe9e688a04b33d3f73ae6886eaaccd"},"schema_version":"1.0"},"canonical_sha256":"0879ae72291c37ccd9e2c9b87b3297504dbe1ff70dabab00c3239f6d99614ea6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:23.128432Z","signature_b64":"UDUgjtk5stdpZjpQtCFWZA1Fj/6S9ZrAIuQGq+5s7GGsmgoPQVQkHjf7UVI5aSbxjJ9Q+Nn+3nazUbNC8WLrDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0879ae72291c37ccd9e2c9b87b3297504dbe1ff70dabab00c3239f6d99614ea6","last_reissued_at":"2026-05-17T23:43:23.127939Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:23.127939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.04044","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":"2026-05-17T23:43:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+07Rj6WLn95DajT4RxqG9EwpeP7MrWHUHaXN7quucH7VQLWfymCwoZfOyLKO08SuuixcFKoIWEJxwCrZPGRXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:45:07.358853Z"},"content_sha256":"519f6f82b369721d186fdfeeced498f15f7de7f511874f8bfe487f9a1d526fd5","schema_version":"1.0","event_id":"sha256:519f6f82b369721d186fdfeeced498f15f7de7f511874f8bfe487f9a1d526fd5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:BB4244RJDQ34ZWPCZG4HWMUXKB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fluid statics of a self-gravitating perfect-gas isothermal sphere","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Arcangelo Labianca, Domenico Giordano, Felice Iavernaro, Francesca Mazzia, Lorenzo Pisani, Monica Lazzo, Pierluigi Amodio","submitted_at":"2019-03-10T19:08:57Z","abstract_excerpt":"We open the paper with introductory considerations describing the motivations of our long-term research plan targeting gravitomagnetism, illustrating the fluid-dynamics numerical test case selected for that purpose, that is, a perfect-gas sphere contained in a solid shell located in empty space sufficiently away from other masses, and defining the main objective of this study: the determination of the gravitofluid-static field required as initial field ($t=0$) in forthcoming fluid-dynamics calculations. The determination of the gravitofluid-static field requires the solution of the isothermal-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.04044","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":"2026-05-17T23:43:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3XVdI9K0w4SDBdcciwrKnXdursn1rLZauhoGDzgb1K/XiSu9+xBHeL21WPzrq7Yz0ayDP0BpokAqEx7EJcwfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:45:07.359204Z"},"content_sha256":"d13c39e2e5cd0c485cbac378b6f8921cd440193e770f909d246f525b25ce7f3f","schema_version":"1.0","event_id":"sha256:d13c39e2e5cd0c485cbac378b6f8921cd440193e770f909d246f525b25ce7f3f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BB4244RJDQ34ZWPCZG4HWMUXKB/bundle.json","state_url":"https://pith.science/pith/BB4244RJDQ34ZWPCZG4HWMUXKB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BB4244RJDQ34ZWPCZG4HWMUXKB/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":"2026-06-05T12:45:07Z","links":{"resolver":"https://pith.science/pith/BB4244RJDQ34ZWPCZG4HWMUXKB","bundle":"https://pith.science/pith/BB4244RJDQ34ZWPCZG4HWMUXKB/bundle.json","state":"https://pith.science/pith/BB4244RJDQ34ZWPCZG4HWMUXKB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BB4244RJDQ34ZWPCZG4HWMUXKB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:BB4244RJDQ34ZWPCZG4HWMUXKB","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":"b48286e427fbed985c285259c63581a2a1fe9e688a04b33d3f73ae6886eaaccd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-10T19:08:57Z","title_canon_sha256":"9c097f049c6d2494f90c86e2c0119968f371ac719339773a7c11ec8100c3d4df"},"schema_version":"1.0","source":{"id":"1903.04044","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.04044","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"arxiv_version","alias_value":"1903.04044v1","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.04044","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"pith_short_12","alias_value":"BB4244RJDQ34","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BB4244RJDQ34ZWPC","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BB4244RJ","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:d13c39e2e5cd0c485cbac378b6f8921cd440193e770f909d246f525b25ce7f3f","target":"graph","created_at":"2026-05-17T23:43:23Z","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 open the paper with introductory considerations describing the motivations of our long-term research plan targeting gravitomagnetism, illustrating the fluid-dynamics numerical test case selected for that purpose, that is, a perfect-gas sphere contained in a solid shell located in empty space sufficiently away from other masses, and defining the main objective of this study: the determination of the gravitofluid-static field required as initial field ($t=0$) in forthcoming fluid-dynamics calculations. The determination of the gravitofluid-static field requires the solution of the isothermal-","authors_text":"Arcangelo Labianca, Domenico Giordano, Felice Iavernaro, Francesca Mazzia, Lorenzo Pisani, Monica Lazzo, Pierluigi Amodio","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-10T19:08:57Z","title":"Fluid statics of a self-gravitating perfect-gas isothermal sphere"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.04044","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":"sha256:519f6f82b369721d186fdfeeced498f15f7de7f511874f8bfe487f9a1d526fd5","target":"record","created_at":"2026-05-17T23:43:23Z","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":"b48286e427fbed985c285259c63581a2a1fe9e688a04b33d3f73ae6886eaaccd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-03-10T19:08:57Z","title_canon_sha256":"9c097f049c6d2494f90c86e2c0119968f371ac719339773a7c11ec8100c3d4df"},"schema_version":"1.0","source":{"id":"1903.04044","kind":"arxiv","version":1}},"canonical_sha256":"0879ae72291c37ccd9e2c9b87b3297504dbe1ff70dabab00c3239f6d99614ea6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0879ae72291c37ccd9e2c9b87b3297504dbe1ff70dabab00c3239f6d99614ea6","first_computed_at":"2026-05-17T23:43:23.127939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:23.127939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UDUgjtk5stdpZjpQtCFWZA1Fj/6S9ZrAIuQGq+5s7GGsmgoPQVQkHjf7UVI5aSbxjJ9Q+Nn+3nazUbNC8WLrDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:23.128432Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.04044","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:519f6f82b369721d186fdfeeced498f15f7de7f511874f8bfe487f9a1d526fd5","sha256:d13c39e2e5cd0c485cbac378b6f8921cd440193e770f909d246f525b25ce7f3f"],"state_sha256":"7c840e9476717af1a9f9bf745898516349f5e6f35d81b2cb6294e67fbd144659"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jk4pTRMJjqYAl/JekfYfQ8I8XKTAYTfYb99FIcnp/ZnlACCmmD/tctwYZu9MPyw3qDQ+cjWy1c4fBe152pGvDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:45:07.361087Z","bundle_sha256":"45afe49f7ff44dc4661f4cd670a48a25f2534078600ef54883f22635586de54b"}}