{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1994:HOGMOLSFXCO4XGHDDBTQIULWJC","short_pith_number":"pith:HOGMOLSF","canonical_record":{"source":{"id":"gr-qc/9407004","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1994-07-06T00:18:33Z","cross_cats_sorted":[],"title_canon_sha256":"eb108e384cf35a238d5144e27a225b3a19fa73e69279be557b16b0d26dfc08b6","abstract_canon_sha256":"7c8100fbefd6def17c7c25a02aac99b693b89c44a2371b38266b22be6e922815"},"schema_version":"1.0"},"canonical_sha256":"3b8cc72e45b89dcb98e31867045176489521cee2f728a82de5f8c442a9dc15d8","source":{"kind":"arxiv","id":"gr-qc/9407004","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9407004","created_at":"2026-05-18T04:37:57Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9407004v1","created_at":"2026-05-18T04:37:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9407004","created_at":"2026-05-18T04:37:57Z"},{"alias_kind":"pith_short_12","alias_value":"HOGMOLSFXCO4","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"HOGMOLSFXCO4XGHD","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"HOGMOLSF","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1994:HOGMOLSFXCO4XGHDDBTQIULWJC","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/9407004","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"1994-07-06T00:18:33Z","cross_cats_sorted":[],"title_canon_sha256":"eb108e384cf35a238d5144e27a225b3a19fa73e69279be557b16b0d26dfc08b6","abstract_canon_sha256":"7c8100fbefd6def17c7c25a02aac99b693b89c44a2371b38266b22be6e922815"},"schema_version":"1.0"},"canonical_sha256":"3b8cc72e45b89dcb98e31867045176489521cee2f728a82de5f8c442a9dc15d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:37:57.059368Z","signature_b64":"2dHIHgPKpWbgxbMkwkd/7wNLwfWUwfvSjwMY5AJ0wIjo5vcEtnq9+jf+B7mWcLUOigwv8b36WFVi2UOTDtjaDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3b8cc72e45b89dcb98e31867045176489521cee2f728a82de5f8c442a9dc15d8","last_reissued_at":"2026-05-18T04:37:57.058737Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:37:57.058737Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/9407004","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":"2026-05-18T04:37:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UJuTg8IGQ9qKIafusAPTKK+gXQiQXqF4uxzvM1KHSpQpkZamAWWTnTQ6UPrgB0BqYQWpQsFRadIq1puKJMFtBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T20:52:28.201426Z"},"content_sha256":"3e6db973abe6f1b76b19a4ce1eda3afd7c1b635de0eeace2a751e0ffc2bbbe75","schema_version":"1.0","event_id":"sha256:3e6db973abe6f1b76b19a4ce1eda3afd7c1b635de0eeace2a751e0ffc2bbbe75"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1994:HOGMOLSFXCO4XGHDDBTQIULWJC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Quadratic Spinor Lagrangian for General Relativity","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"James M. Nester, Roh Suan Tung","submitted_at":"1994-07-06T00:18:33Z","abstract_excerpt":"We present a new finite action for Einstein gravity in which the Lagrangian is quadratic in the covariant derivative of a spinor field. Via a new spinor-curvature identity, it is related to the standard Einstein-Hilbert Lagrangian by a total differential term. The corresponding Hamiltonian, like the one associated with the Witten positive energy proof is fully four-covariant. It defines quasi-local energy-momentum and can be reduced to the one in our recent positive energy proof. (Fourth Prize, 1994 Gravity Research Foundation Essay.)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9407004","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":"2026-05-18T04:37:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dWmkuf920tiYVcyxOyErlq95I0Q5oOzGvGrsmJi85MKgFKR6C2AWQUi47qIOTkzbUyw/DI30kKzzmLIpv4sSDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T20:52:28.201768Z"},"content_sha256":"b46c1764546bc38ef135d6319e039652a39ceb9c24db38099a869a7a3cbc626f","schema_version":"1.0","event_id":"sha256:b46c1764546bc38ef135d6319e039652a39ceb9c24db38099a869a7a3cbc626f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HOGMOLSFXCO4XGHDDBTQIULWJC/bundle.json","state_url":"https://pith.science/pith/HOGMOLSFXCO4XGHDDBTQIULWJC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HOGMOLSFXCO4XGHDDBTQIULWJC/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":"2026-07-04T20:52:28Z","links":{"resolver":"https://pith.science/pith/HOGMOLSFXCO4XGHDDBTQIULWJC","bundle":"https://pith.science/pith/HOGMOLSFXCO4XGHDDBTQIULWJC/bundle.json","state":"https://pith.science/pith/HOGMOLSFXCO4XGHDDBTQIULWJC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HOGMOLSFXCO4XGHDDBTQIULWJC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1994:HOGMOLSFXCO4XGHDDBTQIULWJC","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":"7c8100fbefd6def17c7c25a02aac99b693b89c44a2371b38266b22be6e922815","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1994-07-06T00:18:33Z","title_canon_sha256":"eb108e384cf35a238d5144e27a225b3a19fa73e69279be557b16b0d26dfc08b6"},"schema_version":"1.0","source":{"id":"gr-qc/9407004","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9407004","created_at":"2026-05-18T04:37:57Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9407004v1","created_at":"2026-05-18T04:37:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9407004","created_at":"2026-05-18T04:37:57Z"},{"alias_kind":"pith_short_12","alias_value":"HOGMOLSFXCO4","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"HOGMOLSFXCO4XGHD","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"HOGMOLSF","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:b46c1764546bc38ef135d6319e039652a39ceb9c24db38099a869a7a3cbc626f","target":"graph","created_at":"2026-05-18T04:37:57Z","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 a new finite action for Einstein gravity in which the Lagrangian is quadratic in the covariant derivative of a spinor field. Via a new spinor-curvature identity, it is related to the standard Einstein-Hilbert Lagrangian by a total differential term. The corresponding Hamiltonian, like the one associated with the Witten positive energy proof is fully four-covariant. It defines quasi-local energy-momentum and can be reduced to the one in our recent positive energy proof. (Fourth Prize, 1994 Gravity Research Foundation Essay.)","authors_text":"James M. Nester, Roh Suan Tung","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"1994-07-06T00:18:33Z","title":"A Quadratic Spinor Lagrangian for General Relativity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9407004","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":"sha256:3e6db973abe6f1b76b19a4ce1eda3afd7c1b635de0eeace2a751e0ffc2bbbe75","target":"record","created_at":"2026-05-18T04:37:57Z","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":"7c8100fbefd6def17c7c25a02aac99b693b89c44a2371b38266b22be6e922815","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1994-07-06T00:18:33Z","title_canon_sha256":"eb108e384cf35a238d5144e27a225b3a19fa73e69279be557b16b0d26dfc08b6"},"schema_version":"1.0","source":{"id":"gr-qc/9407004","kind":"arxiv","version":1}},"canonical_sha256":"3b8cc72e45b89dcb98e31867045176489521cee2f728a82de5f8c442a9dc15d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3b8cc72e45b89dcb98e31867045176489521cee2f728a82de5f8c442a9dc15d8","first_computed_at":"2026-05-18T04:37:57.058737Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:37:57.058737Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2dHIHgPKpWbgxbMkwkd/7wNLwfWUwfvSjwMY5AJ0wIjo5vcEtnq9+jf+B7mWcLUOigwv8b36WFVi2UOTDtjaDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:37:57.059368Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/9407004","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e6db973abe6f1b76b19a4ce1eda3afd7c1b635de0eeace2a751e0ffc2bbbe75","sha256:b46c1764546bc38ef135d6319e039652a39ceb9c24db38099a869a7a3cbc626f"],"state_sha256":"b68ffe0a01c217c74570e61835303c8683910bffd3d0269f3cbfd96b893954e0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4ANmLXb8GRSaokkC56ZKwBqLJmd/AnYW3Ie3bwDYcHcawBPb29EZNITQe637Qf5AOI3l9pFfGMj5e6EfcjWFDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T20:52:28.203633Z","bundle_sha256":"24bda8915f84c416f27232d0fa0b0dc881e3b5848121137629123d00d02437fc"}}