{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:PAGZCNEWKKTCTCIQCLKEORDLY2","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":"7ec6e060485096f8233d6ae96e55535eab17403180b49f641891b68a43540d13","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-01-06T05:13:37Z","title_canon_sha256":"2474f1e2d7b979fef0633ea75662508615367d203e00461e7fb14d358b694b38"},"schema_version":"1.0","source":{"id":"1701.01545","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01545","created_at":"2026-05-18T00:49:10Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01545v1","created_at":"2026-05-18T00:49:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01545","created_at":"2026-05-18T00:49:10Z"},{"alias_kind":"pith_short_12","alias_value":"PAGZCNEWKKTC","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PAGZCNEWKKTCTCIQ","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PAGZCNEW","created_at":"2026-05-18T12:31:37Z"}],"graph_snapshots":[{"event_id":"sha256:96997e741675a908eae4709ad9b9e70db058418401225084347e891e429d46ac","target":"graph","created_at":"2026-05-18T00:49:10Z","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 show that an effective particle Lagrangian yields the Mathisson-Papapetrou-Dixon (MPD) equations. The spin of the effective particle is defined without any reference to a fixed body frame or angular velocity variable. We then demonstrate that a continuous body, defined by a congruence of world lines and described by a general action, can be rewritten as an effective particle. We analyze the gauge freedom of the body and show that a natural center of mass condition is related to a spin supplementary condition.","authors_text":"J. David Brown, S. P. Loomis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-01-06T05:13:37Z","title":"Continuous body dynamics and the Mathisson-Papapetrou-Dixon equations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01545","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":"sha256:161548d6fe569a8536b6bcfba6056251ee10bcc8c52a37f297192eeb2a808076","target":"record","created_at":"2026-05-18T00:49:10Z","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":"7ec6e060485096f8233d6ae96e55535eab17403180b49f641891b68a43540d13","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-01-06T05:13:37Z","title_canon_sha256":"2474f1e2d7b979fef0633ea75662508615367d203e00461e7fb14d358b694b38"},"schema_version":"1.0","source":{"id":"1701.01545","kind":"arxiv","version":1}},"canonical_sha256":"780d91349652a629891012d447446bc6addba0cad69a0fdbaf85fa148c330162","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"780d91349652a629891012d447446bc6addba0cad69a0fdbaf85fa148c330162","first_computed_at":"2026-05-18T00:49:10.221853Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:10.221853Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h/wRbUQHd4OdzOP63XuQitk/Qg+EZE2vQ1cq2XAkO0KD+7yXRpDvwa0Ori55XtqLIEHeDcF2X9ozNs4y2LGeAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:10.222330Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.01545","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:161548d6fe569a8536b6bcfba6056251ee10bcc8c52a37f297192eeb2a808076","sha256:96997e741675a908eae4709ad9b9e70db058418401225084347e891e429d46ac"],"state_sha256":"4abfe50537ba89e976b6dd5315606e31ed02f7a32bd8bb119a5278661351f7dd"}