{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:W23SXJ5EXDL2KDTM7HYOXXUNEN","short_pith_number":"pith:W23SXJ5E","canonical_record":{"source":{"id":"1512.03912","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-12-12T13:22:32Z","cross_cats_sorted":[],"title_canon_sha256":"04b5887212fb82d6fea3a139b2c77ca0368eca9da5c075d5dcf2f26c3780c694","abstract_canon_sha256":"9b47d8ca03ce2b442cbbdf47b25fff1af9934199f5e8b1fd50fd35d622bc9986"},"schema_version":"1.0"},"canonical_sha256":"b6b72ba7a4b8d7a50e6cf9f0ebde8d236648d4081f666a8cd6d813c65646f12c","source":{"kind":"arxiv","id":"1512.03912","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03912","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03912v2","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03912","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"W23SXJ5EXDL2","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"W23SXJ5EXDL2KDTM","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"W23SXJ5E","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:W23SXJ5EXDL2KDTM7HYOXXUNEN","target":"record","payload":{"canonical_record":{"source":{"id":"1512.03912","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-12-12T13:22:32Z","cross_cats_sorted":[],"title_canon_sha256":"04b5887212fb82d6fea3a139b2c77ca0368eca9da5c075d5dcf2f26c3780c694","abstract_canon_sha256":"9b47d8ca03ce2b442cbbdf47b25fff1af9934199f5e8b1fd50fd35d622bc9986"},"schema_version":"1.0"},"canonical_sha256":"b6b72ba7a4b8d7a50e6cf9f0ebde8d236648d4081f666a8cd6d813c65646f12c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:31.921389Z","signature_b64":"QsqkSyNz7rNDKU2j3UylNir15wcHlA1AHgzpaHSId6+26s9xehN6+SImcVSn3bNE8lCAzS+jHpMhbk6++J9nAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b6b72ba7a4b8d7a50e6cf9f0ebde8d236648d4081f666a8cd6d813c65646f12c","last_reissued_at":"2026-05-18T01:11:31.920975Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:31.920975Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.03912","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r5aW4mrAdlelQmZJn+BWboc6I/DGCUhDNzaM/fPCYbf28c5VI0H49YB1r9VMoVBLbLZBlQU1Kd4K6My8rqnqDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:01:12.405614Z"},"content_sha256":"a246f641748972a00b89952cbeab9755d1ee06b7929678c396e91ead69ba5392","schema_version":"1.0","event_id":"sha256:a246f641748972a00b89952cbeab9755d1ee06b7929678c396e91ead69ba5392"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:W23SXJ5EXDL2KDTM7HYOXXUNEN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Kinematic Constraints in Generally Covariant Non-Linear Electrodynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Horst-Heino von Borzeszkowski, Rico Berner, Thoralf Chrobok","submitted_at":"2015-12-12T13:22:32Z","abstract_excerpt":"In this paper, we show how the motion of physical fields, in particular the electromagnetic potential, is connected with the choice of a space and time decomposition of the background spacetime manifold. The relation of the field dynamics and its kinematic description is derived with the help of the parametrization approach. In this context, we give an original proof for the main statement of this approach. With regard to generally covariant theories, the arising kinematic constraints are investigated for the class of non-linear electrodynamics. We reduce the problem of finding the explicit fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03912","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tn30HvG20RhV7/7iGFoU8TT/Ebcwg9ZJ+U642z/Mx9FXue6IUTcq1HoRD+mlOO/NpXBtSZtpinzc5ObDo/uIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:01:12.405964Z"},"content_sha256":"981e3bea0d743202136b7d82d713fd69edfe157ba6f32a3bda4b581bc1aae434","schema_version":"1.0","event_id":"sha256:981e3bea0d743202136b7d82d713fd69edfe157ba6f32a3bda4b581bc1aae434"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W23SXJ5EXDL2KDTM7HYOXXUNEN/bundle.json","state_url":"https://pith.science/pith/W23SXJ5EXDL2KDTM7HYOXXUNEN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W23SXJ5EXDL2KDTM7HYOXXUNEN/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":"2026-06-03T14:01:12Z","links":{"resolver":"https://pith.science/pith/W23SXJ5EXDL2KDTM7HYOXXUNEN","bundle":"https://pith.science/pith/W23SXJ5EXDL2KDTM7HYOXXUNEN/bundle.json","state":"https://pith.science/pith/W23SXJ5EXDL2KDTM7HYOXXUNEN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W23SXJ5EXDL2KDTM7HYOXXUNEN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:W23SXJ5EXDL2KDTM7HYOXXUNEN","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":"9b47d8ca03ce2b442cbbdf47b25fff1af9934199f5e8b1fd50fd35d622bc9986","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-12-12T13:22:32Z","title_canon_sha256":"04b5887212fb82d6fea3a139b2c77ca0368eca9da5c075d5dcf2f26c3780c694"},"schema_version":"1.0","source":{"id":"1512.03912","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03912","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03912v2","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03912","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"W23SXJ5EXDL2","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"W23SXJ5EXDL2KDTM","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"W23SXJ5E","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:981e3bea0d743202136b7d82d713fd69edfe157ba6f32a3bda4b581bc1aae434","target":"graph","created_at":"2026-05-18T01:11:31Z","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":"In this paper, we show how the motion of physical fields, in particular the electromagnetic potential, is connected with the choice of a space and time decomposition of the background spacetime manifold. The relation of the field dynamics and its kinematic description is derived with the help of the parametrization approach. In this context, we give an original proof for the main statement of this approach. With regard to generally covariant theories, the arising kinematic constraints are investigated for the class of non-linear electrodynamics. We reduce the problem of finding the explicit fo","authors_text":"Horst-Heino von Borzeszkowski, Rico Berner, Thoralf Chrobok","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-12-12T13:22:32Z","title":"Kinematic Constraints in Generally Covariant Non-Linear Electrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03912","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:a246f641748972a00b89952cbeab9755d1ee06b7929678c396e91ead69ba5392","target":"record","created_at":"2026-05-18T01:11:31Z","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":"9b47d8ca03ce2b442cbbdf47b25fff1af9934199f5e8b1fd50fd35d622bc9986","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-12-12T13:22:32Z","title_canon_sha256":"04b5887212fb82d6fea3a139b2c77ca0368eca9da5c075d5dcf2f26c3780c694"},"schema_version":"1.0","source":{"id":"1512.03912","kind":"arxiv","version":2}},"canonical_sha256":"b6b72ba7a4b8d7a50e6cf9f0ebde8d236648d4081f666a8cd6d813c65646f12c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b6b72ba7a4b8d7a50e6cf9f0ebde8d236648d4081f666a8cd6d813c65646f12c","first_computed_at":"2026-05-18T01:11:31.920975Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:31.920975Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QsqkSyNz7rNDKU2j3UylNir15wcHlA1AHgzpaHSId6+26s9xehN6+SImcVSn3bNE8lCAzS+jHpMhbk6++J9nAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:31.921389Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.03912","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a246f641748972a00b89952cbeab9755d1ee06b7929678c396e91ead69ba5392","sha256:981e3bea0d743202136b7d82d713fd69edfe157ba6f32a3bda4b581bc1aae434"],"state_sha256":"fee9132be8a7db473aec8c6641629579f5b9f2079a24f4f1f6f72eebf8221384"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fN4y8BDRbWmzDsfGzdVl1Mn+eFYD5b39vQREPg+dMOSaheDK+Gm/9WUqi1KLv8h6ejGKHSmqNwC5M0LORVgBBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:01:12.407944Z","bundle_sha256":"8bb307e53d71f11036f28615932c0b1b61a581b94b12039adbe31f632656b2a1"}}