{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:HZZJSAG7HGZ7XJSZCTENQ2G2O6","short_pith_number":"pith:HZZJSAG7","canonical_record":{"source":{"id":"0706.2991","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"2007-06-20T14:07:49Z","cross_cats_sorted":[],"title_canon_sha256":"d0c2b1461a57dbf0664ffd497a6d1a5a8548a6457e20715fe1f8839f7c0a344d","abstract_canon_sha256":"1b2b11a5b299878e4339f45ecd55014548a45eedcb3962aece04f15bc5195cc8"},"schema_version":"1.0"},"canonical_sha256":"3e729900df39b3fba65914c8d868da77bb6b163ef1b06e3351ba94fcf47c4e8e","source":{"kind":"arxiv","id":"0706.2991","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.2991","created_at":"2026-05-18T03:31:42Z"},{"alias_kind":"arxiv_version","alias_value":"0706.2991v1","created_at":"2026-05-18T03:31:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.2991","created_at":"2026-05-18T03:31:42Z"},{"alias_kind":"pith_short_12","alias_value":"HZZJSAG7HGZ7","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"HZZJSAG7HGZ7XJSZ","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"HZZJSAG7","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:HZZJSAG7HGZ7XJSZCTENQ2G2O6","target":"record","payload":{"canonical_record":{"source":{"id":"0706.2991","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"2007-06-20T14:07:49Z","cross_cats_sorted":[],"title_canon_sha256":"d0c2b1461a57dbf0664ffd497a6d1a5a8548a6457e20715fe1f8839f7c0a344d","abstract_canon_sha256":"1b2b11a5b299878e4339f45ecd55014548a45eedcb3962aece04f15bc5195cc8"},"schema_version":"1.0"},"canonical_sha256":"3e729900df39b3fba65914c8d868da77bb6b163ef1b06e3351ba94fcf47c4e8e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:31:42.061225Z","signature_b64":"XFEF6EM3tt9dzXOv1NyhxwssK4mbla1HeTud1RmQo939haF9m00Xzz8OhDL+/l1yicLGaMAbYRW58JgVhHteDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e729900df39b3fba65914c8d868da77bb6b163ef1b06e3351ba94fcf47c4e8e","last_reissued_at":"2026-05-18T03:31:42.060796Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:31:42.060796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0706.2991","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":"2026-05-18T03:31:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1WQo4McI9Rio+Yc+xJLDNU8VF0lgfT5yVnUn2g8x4PYhSuJyzijWioA3zDQxCEgPVy4PozLaNCCicwq8hi2ECQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T12:41:54.039831Z"},"content_sha256":"14e41b2c6365bec8123ddacf205676a93b16d0fd159c3e340ad16992517a7613","schema_version":"1.0","event_id":"sha256:14e41b2c6365bec8123ddacf205676a93b16d0fd159c3e340ad16992517a7613"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:HZZJSAG7HGZ7XJSZCTENQ2G2O6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Wave propagation in axion electrodynamics","license":"","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Yakov Itin","submitted_at":"2007-06-20T14:07:49Z","abstract_excerpt":"In this paper, the axion contribution to the electromagnetic wave propagation is studied. First we show how the axion electrodynamics model can be embedded into a premetric formalism of Maxwell electrodynamics. In this formalism, the axion field is not an arbitrary added Chern-Simon term of the Lagrangian, but emerges in a natural way as an irreducible part of a general constitutive tensor.We show that in order to represent the axion contribution to the wave propagation it is necessary to go beyond the geometric approximation, which is usually used in the premetric formalism. We derive a covar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.2991","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":"2026-05-18T03:31:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mh83igtHQFxzG5Nj2Ok+hlFCozD1CjQXl9wKuihsoJXZG2CGej7NNHOi2RanaZ8yH/JllpMPax/WC+f/FBUDDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T12:41:54.040168Z"},"content_sha256":"e567217889d54d2dea7d36b2849a57e026464f989db5a289efd4d49a23ccbdd1","schema_version":"1.0","event_id":"sha256:e567217889d54d2dea7d36b2849a57e026464f989db5a289efd4d49a23ccbdd1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HZZJSAG7HGZ7XJSZCTENQ2G2O6/bundle.json","state_url":"https://pith.science/pith/HZZJSAG7HGZ7XJSZCTENQ2G2O6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HZZJSAG7HGZ7XJSZCTENQ2G2O6/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":"2026-06-08T12:41:54Z","links":{"resolver":"https://pith.science/pith/HZZJSAG7HGZ7XJSZCTENQ2G2O6","bundle":"https://pith.science/pith/HZZJSAG7HGZ7XJSZCTENQ2G2O6/bundle.json","state":"https://pith.science/pith/HZZJSAG7HGZ7XJSZCTENQ2G2O6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HZZJSAG7HGZ7XJSZCTENQ2G2O6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:HZZJSAG7HGZ7XJSZCTENQ2G2O6","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":"1b2b11a5b299878e4339f45ecd55014548a45eedcb3962aece04f15bc5195cc8","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"2007-06-20T14:07:49Z","title_canon_sha256":"d0c2b1461a57dbf0664ffd497a6d1a5a8548a6457e20715fe1f8839f7c0a344d"},"schema_version":"1.0","source":{"id":"0706.2991","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.2991","created_at":"2026-05-18T03:31:42Z"},{"alias_kind":"arxiv_version","alias_value":"0706.2991v1","created_at":"2026-05-18T03:31:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.2991","created_at":"2026-05-18T03:31:42Z"},{"alias_kind":"pith_short_12","alias_value":"HZZJSAG7HGZ7","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"HZZJSAG7HGZ7XJSZ","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"HZZJSAG7","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:e567217889d54d2dea7d36b2849a57e026464f989db5a289efd4d49a23ccbdd1","target":"graph","created_at":"2026-05-18T03:31:42Z","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, the axion contribution to the electromagnetic wave propagation is studied. First we show how the axion electrodynamics model can be embedded into a premetric formalism of Maxwell electrodynamics. In this formalism, the axion field is not an arbitrary added Chern-Simon term of the Lagrangian, but emerges in a natural way as an irreducible part of a general constitutive tensor.We show that in order to represent the axion contribution to the wave propagation it is necessary to go beyond the geometric approximation, which is usually used in the premetric formalism. We derive a covar","authors_text":"Yakov Itin","cross_cats":[],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"2007-06-20T14:07:49Z","title":"Wave propagation in axion electrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.2991","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":"sha256:14e41b2c6365bec8123ddacf205676a93b16d0fd159c3e340ad16992517a7613","target":"record","created_at":"2026-05-18T03:31:42Z","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":"1b2b11a5b299878e4339f45ecd55014548a45eedcb3962aece04f15bc5195cc8","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"2007-06-20T14:07:49Z","title_canon_sha256":"d0c2b1461a57dbf0664ffd497a6d1a5a8548a6457e20715fe1f8839f7c0a344d"},"schema_version":"1.0","source":{"id":"0706.2991","kind":"arxiv","version":1}},"canonical_sha256":"3e729900df39b3fba65914c8d868da77bb6b163ef1b06e3351ba94fcf47c4e8e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3e729900df39b3fba65914c8d868da77bb6b163ef1b06e3351ba94fcf47c4e8e","first_computed_at":"2026-05-18T03:31:42.060796Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:42.060796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XFEF6EM3tt9dzXOv1NyhxwssK4mbla1HeTud1RmQo939haF9m00Xzz8OhDL+/l1yicLGaMAbYRW58JgVhHteDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:42.061225Z","signed_message":"canonical_sha256_bytes"},"source_id":"0706.2991","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14e41b2c6365bec8123ddacf205676a93b16d0fd159c3e340ad16992517a7613","sha256:e567217889d54d2dea7d36b2849a57e026464f989db5a289efd4d49a23ccbdd1"],"state_sha256":"d42377f223f94c37e718fa6392bb1ff5c51568b4c0e6ddb45960d96150ec7537"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kDED6SZga0GMASTPq+H9TEXE4afnSxXC1B2IvAV3xz65569Ybmt/tW0/2/eCnoYwmWO+SNiCsQgxLdSHsA0RDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T12:41:54.042115Z","bundle_sha256":"9a31f70243f8020e6e928c8089c96a221d31be0f54dc813267450fac3ded66e8"}}