{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:CAWGS6O67F26TAOHD7UUTXYDWN","short_pith_number":"pith:CAWGS6O6","canonical_record":{"source":{"id":"1503.04392","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-03-15T05:56:18Z","cross_cats_sorted":[],"title_canon_sha256":"0140770f1daeaa749017971c89a1c269a39c2666db0746ba5e4d6f759ddc4c8b","abstract_canon_sha256":"5ee765d5bb487268978c54b29bdd0a595ef3884abc7347d27c8aac9dd5fc0493"},"schema_version":"1.0"},"canonical_sha256":"102c6979def975e981c71fe949df03b37d75c1f47c825411d98de58047fe9311","source":{"kind":"arxiv","id":"1503.04392","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.04392","created_at":"2026-05-18T02:01:08Z"},{"alias_kind":"arxiv_version","alias_value":"1503.04392v2","created_at":"2026-05-18T02:01:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.04392","created_at":"2026-05-18T02:01:08Z"},{"alias_kind":"pith_short_12","alias_value":"CAWGS6O67F26","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"CAWGS6O67F26TAOH","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"CAWGS6O6","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:CAWGS6O67F26TAOHD7UUTXYDWN","target":"record","payload":{"canonical_record":{"source":{"id":"1503.04392","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-03-15T05:56:18Z","cross_cats_sorted":[],"title_canon_sha256":"0140770f1daeaa749017971c89a1c269a39c2666db0746ba5e4d6f759ddc4c8b","abstract_canon_sha256":"5ee765d5bb487268978c54b29bdd0a595ef3884abc7347d27c8aac9dd5fc0493"},"schema_version":"1.0"},"canonical_sha256":"102c6979def975e981c71fe949df03b37d75c1f47c825411d98de58047fe9311","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:08.290367Z","signature_b64":"FB9Nsv41xQJ2ZkunufCVIrzF/RpaS6GA5ySMFISK4Cz6CX3445mpwgrOCsW2ZMxS4OWPN/ruQa7sjKWM4WYQBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"102c6979def975e981c71fe949df03b37d75c1f47c825411d98de58047fe9311","last_reissued_at":"2026-05-18T02:01:08.289678Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:08.289678Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.04392","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":"2026-05-18T02:01:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FXhXYUZ7TItmJ/kzlNB20YIcryJs0v8i76zPAnScvhfNtGxPTYt/8kHNXXOLE9fLaR245tDNc7TlvJqhb4p9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:36:27.408788Z"},"content_sha256":"03d1d709739ffa3a65c3ae6c4e1759db5f4218b5eaa3ee511ce273095135a4bf","schema_version":"1.0","event_id":"sha256:03d1d709739ffa3a65c3ae6c4e1759db5f4218b5eaa3ee511ce273095135a4bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:CAWGS6O67F26TAOHD7UUTXYDWN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Decomposition of Electromagnetic Q and P Media","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.class-ph","authors_text":"A. Favaro, I.V. Lindell","submitted_at":"2015-03-15T05:56:18Z","abstract_excerpt":"Two previously studied classes of electromagnetic media, labeled as those of Q media and P media, are decomposed according to the natural decomposition introduced by Hehl and Obukhov. Six special cases based on either non-existence or sole existence of the three Hehl-Obukhov components, are defined for both medium classes."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.04392","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":"2026-05-18T02:01:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PF9QEgFXnn2DCa4naS8pRuAKtFueiQ7bEeRAwpsw5GPN0HhMMQ2FWgMY7e85JNvmkZtTjccLo64odfK+qdwEBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:36:27.409482Z"},"content_sha256":"44d136031f39f2a65c958b752743f4fd1c1a9814d88f00f1f5fdf8caad91a3f6","schema_version":"1.0","event_id":"sha256:44d136031f39f2a65c958b752743f4fd1c1a9814d88f00f1f5fdf8caad91a3f6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CAWGS6O67F26TAOHD7UUTXYDWN/bundle.json","state_url":"https://pith.science/pith/CAWGS6O67F26TAOHD7UUTXYDWN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CAWGS6O67F26TAOHD7UUTXYDWN/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":"2026-06-01T02:36:27Z","links":{"resolver":"https://pith.science/pith/CAWGS6O67F26TAOHD7UUTXYDWN","bundle":"https://pith.science/pith/CAWGS6O67F26TAOHD7UUTXYDWN/bundle.json","state":"https://pith.science/pith/CAWGS6O67F26TAOHD7UUTXYDWN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CAWGS6O67F26TAOHD7UUTXYDWN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:CAWGS6O67F26TAOHD7UUTXYDWN","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":"5ee765d5bb487268978c54b29bdd0a595ef3884abc7347d27c8aac9dd5fc0493","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-03-15T05:56:18Z","title_canon_sha256":"0140770f1daeaa749017971c89a1c269a39c2666db0746ba5e4d6f759ddc4c8b"},"schema_version":"1.0","source":{"id":"1503.04392","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.04392","created_at":"2026-05-18T02:01:08Z"},{"alias_kind":"arxiv_version","alias_value":"1503.04392v2","created_at":"2026-05-18T02:01:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.04392","created_at":"2026-05-18T02:01:08Z"},{"alias_kind":"pith_short_12","alias_value":"CAWGS6O67F26","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"CAWGS6O67F26TAOH","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"CAWGS6O6","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:44d136031f39f2a65c958b752743f4fd1c1a9814d88f00f1f5fdf8caad91a3f6","target":"graph","created_at":"2026-05-18T02:01:08Z","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":"Two previously studied classes of electromagnetic media, labeled as those of Q media and P media, are decomposed according to the natural decomposition introduced by Hehl and Obukhov. Six special cases based on either non-existence or sole existence of the three Hehl-Obukhov components, are defined for both medium classes.","authors_text":"A. Favaro, I.V. Lindell","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-03-15T05:56:18Z","title":"Decomposition of Electromagnetic Q and P Media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.04392","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":"sha256:03d1d709739ffa3a65c3ae6c4e1759db5f4218b5eaa3ee511ce273095135a4bf","target":"record","created_at":"2026-05-18T02:01:08Z","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":"5ee765d5bb487268978c54b29bdd0a595ef3884abc7347d27c8aac9dd5fc0493","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2015-03-15T05:56:18Z","title_canon_sha256":"0140770f1daeaa749017971c89a1c269a39c2666db0746ba5e4d6f759ddc4c8b"},"schema_version":"1.0","source":{"id":"1503.04392","kind":"arxiv","version":2}},"canonical_sha256":"102c6979def975e981c71fe949df03b37d75c1f47c825411d98de58047fe9311","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"102c6979def975e981c71fe949df03b37d75c1f47c825411d98de58047fe9311","first_computed_at":"2026-05-18T02:01:08.289678Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:08.289678Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FB9Nsv41xQJ2ZkunufCVIrzF/RpaS6GA5ySMFISK4Cz6CX3445mpwgrOCsW2ZMxS4OWPN/ruQa7sjKWM4WYQBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:08.290367Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.04392","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03d1d709739ffa3a65c3ae6c4e1759db5f4218b5eaa3ee511ce273095135a4bf","sha256:44d136031f39f2a65c958b752743f4fd1c1a9814d88f00f1f5fdf8caad91a3f6"],"state_sha256":"6ed076b2c644afa080d6a94c646e45ccb1c4ba7f793ddc9e93fceb2ac30fb19d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x6gQsNWZZx3RKf3RpeDS2R2V6l48OecqqAJQRA1hLlC1rSY2w7qPsCy2ec5pj/M2PvZZBiGp39nkQb+XiIRcCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T02:36:27.414018Z","bundle_sha256":"91eb5366636088c7ccd31b01eb37d1167ccd7023a9ee17d907a0d3ef39937beb"}}