{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:LCNCC7MEYFSDIOOFUQ3LAHTYFA","short_pith_number":"pith:LCNCC7ME","canonical_record":{"source":{"id":"0907.5278","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-30T08:38:58Z","cross_cats_sorted":["physics.gen-ph"],"title_canon_sha256":"aebea353762d33310e6f8a4034bbfe431639cde56992f97ff4e556bdd68364fe","abstract_canon_sha256":"2e818452a8c291bf4ffa9fbe545872e16cf42a404bfa74288e6d24f7e8e29f99"},"schema_version":"1.0"},"canonical_sha256":"589a217d84c1643439c5a436b01e78282eafbb9f0dc5b4cb2e827af6e404ad0f","source":{"kind":"arxiv","id":"0907.5278","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.5278","created_at":"2026-05-18T02:12:46Z"},{"alias_kind":"arxiv_version","alias_value":"0907.5278v1","created_at":"2026-05-18T02:12:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.5278","created_at":"2026-05-18T02:12:46Z"},{"alias_kind":"pith_short_12","alias_value":"LCNCC7MEYFSD","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"LCNCC7MEYFSDIOOF","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"LCNCC7ME","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:LCNCC7MEYFSDIOOFUQ3LAHTYFA","target":"record","payload":{"canonical_record":{"source":{"id":"0907.5278","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-30T08:38:58Z","cross_cats_sorted":["physics.gen-ph"],"title_canon_sha256":"aebea353762d33310e6f8a4034bbfe431639cde56992f97ff4e556bdd68364fe","abstract_canon_sha256":"2e818452a8c291bf4ffa9fbe545872e16cf42a404bfa74288e6d24f7e8e29f99"},"schema_version":"1.0"},"canonical_sha256":"589a217d84c1643439c5a436b01e78282eafbb9f0dc5b4cb2e827af6e404ad0f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:46.214208Z","signature_b64":"mGKbX2hx6ZETHoqaZTi3AC54CB1/0VVo7ialIvh2Gh7Qpq52Bo1IR1Y6YkpWZmY+1MzXbxEPw/ncfhNjHU+qDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"589a217d84c1643439c5a436b01e78282eafbb9f0dc5b4cb2e827af6e404ad0f","last_reissued_at":"2026-05-18T02:12:46.213587Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:46.213587Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.5278","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":"2026-05-18T02:12:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wm8d4bI/a0er34K7o32JDNdU98NlEYgi0TCquPMApkWF8OgK/FRAs+PMqEsuypoKAyEoClkYTqChEWpZls9cAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T12:00:59.634353Z"},"content_sha256":"c8dd64cf2fa6b934ba2558f8aba4bb80e6fed953fb0191f73743c7569ac80a04","schema_version":"1.0","event_id":"sha256:c8dd64cf2fa6b934ba2558f8aba4bb80e6fed953fb0191f73743c7569ac80a04"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:LCNCC7MEYFSDIOOFUQ3LAHTYFA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Negative and positive refraction are not Lorentz covariant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.gen-ph"],"primary_cat":"physics.optics","authors_text":"Akhlesh Lakhtakia (Pennsylvania State University), Tom G. Mackay (University of Edinburgh)","submitted_at":"2009-07-30T08:38:58Z","abstract_excerpt":"The refraction of linearly polarized plane waves into a half-space occupied by a material moving at constant velocity was studied by directly implementing the Lorentz transformations of electric and magnetic fields. From the perspective of a co-moving observer, the moving material was a spatially local, pseudochiral omega material. Numerical studies revealed that whether or not negative refraction occurrs in the moving material depends upon the speed of movement as well as the angle of incidence and the polarization state of the incident plane wave. Furthermore, the phenomenons of negative pha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.5278","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":"2026-05-18T02:12:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jCcRSerLW8pIyl/TD++Tw1JsU0jQDXzn7ggnfFgqstycbU5ckfQc0KDWUBcNUlvur+iapugzQfuWJ64WzK+HBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T12:00:59.635050Z"},"content_sha256":"91ad430a14a6e8d336aa09ee535689154171f529cf48c10c1015b9f8c405482c","schema_version":"1.0","event_id":"sha256:91ad430a14a6e8d336aa09ee535689154171f529cf48c10c1015b9f8c405482c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LCNCC7MEYFSDIOOFUQ3LAHTYFA/bundle.json","state_url":"https://pith.science/pith/LCNCC7MEYFSDIOOFUQ3LAHTYFA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LCNCC7MEYFSDIOOFUQ3LAHTYFA/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":"2026-06-07T12:00:59Z","links":{"resolver":"https://pith.science/pith/LCNCC7MEYFSDIOOFUQ3LAHTYFA","bundle":"https://pith.science/pith/LCNCC7MEYFSDIOOFUQ3LAHTYFA/bundle.json","state":"https://pith.science/pith/LCNCC7MEYFSDIOOFUQ3LAHTYFA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LCNCC7MEYFSDIOOFUQ3LAHTYFA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:LCNCC7MEYFSDIOOFUQ3LAHTYFA","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":"2e818452a8c291bf4ffa9fbe545872e16cf42a404bfa74288e6d24f7e8e29f99","cross_cats_sorted":["physics.gen-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-30T08:38:58Z","title_canon_sha256":"aebea353762d33310e6f8a4034bbfe431639cde56992f97ff4e556bdd68364fe"},"schema_version":"1.0","source":{"id":"0907.5278","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.5278","created_at":"2026-05-18T02:12:46Z"},{"alias_kind":"arxiv_version","alias_value":"0907.5278v1","created_at":"2026-05-18T02:12:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.5278","created_at":"2026-05-18T02:12:46Z"},{"alias_kind":"pith_short_12","alias_value":"LCNCC7MEYFSD","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"LCNCC7MEYFSDIOOF","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"LCNCC7ME","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:91ad430a14a6e8d336aa09ee535689154171f529cf48c10c1015b9f8c405482c","target":"graph","created_at":"2026-05-18T02:12:46Z","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":"The refraction of linearly polarized plane waves into a half-space occupied by a material moving at constant velocity was studied by directly implementing the Lorentz transformations of electric and magnetic fields. From the perspective of a co-moving observer, the moving material was a spatially local, pseudochiral omega material. Numerical studies revealed that whether or not negative refraction occurrs in the moving material depends upon the speed of movement as well as the angle of incidence and the polarization state of the incident plane wave. Furthermore, the phenomenons of negative pha","authors_text":"Akhlesh Lakhtakia (Pennsylvania State University), Tom G. Mackay (University of Edinburgh)","cross_cats":["physics.gen-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-30T08:38:58Z","title":"Negative and positive refraction are not Lorentz covariant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.5278","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:c8dd64cf2fa6b934ba2558f8aba4bb80e6fed953fb0191f73743c7569ac80a04","target":"record","created_at":"2026-05-18T02:12:46Z","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":"2e818452a8c291bf4ffa9fbe545872e16cf42a404bfa74288e6d24f7e8e29f99","cross_cats_sorted":["physics.gen-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-30T08:38:58Z","title_canon_sha256":"aebea353762d33310e6f8a4034bbfe431639cde56992f97ff4e556bdd68364fe"},"schema_version":"1.0","source":{"id":"0907.5278","kind":"arxiv","version":1}},"canonical_sha256":"589a217d84c1643439c5a436b01e78282eafbb9f0dc5b4cb2e827af6e404ad0f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"589a217d84c1643439c5a436b01e78282eafbb9f0dc5b4cb2e827af6e404ad0f","first_computed_at":"2026-05-18T02:12:46.213587Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:46.213587Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mGKbX2hx6ZETHoqaZTi3AC54CB1/0VVo7ialIvh2Gh7Qpq52Bo1IR1Y6YkpWZmY+1MzXbxEPw/ncfhNjHU+qDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:46.214208Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.5278","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8dd64cf2fa6b934ba2558f8aba4bb80e6fed953fb0191f73743c7569ac80a04","sha256:91ad430a14a6e8d336aa09ee535689154171f529cf48c10c1015b9f8c405482c"],"state_sha256":"70429d68c09240b84eeaf9cacb1a42e8499da6f08ee8be105c95079772205e08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ow5R42xrZmDw7VzhMfMg+dvrDmmQgxWQrj5c4UlzZOswOdQIBedPxGuAzIB0ehdbyD47dXcvKFhfn4dhhVCUAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T12:00:59.638598Z","bundle_sha256":"108d8a65ef62df8ed7f01503503678cac5a450dd152bdd5c679746540b084d22"}}